Here are Todays Amazing Taylor Hobson Deals!
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![]() Taylor Hobson Cooke Speed Panchro Ser II 50mm f2 T23 late version for parts $315.00 Time Remaining: 29d 3h 31m Buy It Now for only: $315.00 Buy It Now | Add to watch list |
![]() Leica Xenon 5cm f15 SM Lens Taylor Hobson Patent c1937 $355.98 (19 Bids) Time Remaining: 2h 26m Bid now | Add to watch list |
![]() Taylor Hobson Cooke Deep Field Panchro ser II 100mm f 25 T 28 late $3,950.00 Time Remaining: 29d 4h 26m Buy It Now for only: $3,950.00 Buy It Now | Add to watch list |
![]() Taylor Hobson Cooke Panchro ser II 75mm f2 arriflex $425.00 Time Remaining: 20d 12h 34m Buy It Now for only: $425.00 Buy It Now | Add to watch list |
![]() Taylor Hobson Cooke Speed 40mm f 2 O rare $995.00 Time Remaining: 20d 12h 31m Buy It Now for only: $995.00 Buy It Now | Add to watch list |
![]() Taylor Hobson Cooke Speed Panchro 50mm f2 T23 Arriflex $1,780.00 Time Remaining: 23d 5h 43m Buy It Now for only: $1,780.00 Buy It Now | Add to watch list |
![]() Taylor Hobson Cooke Speed Panchro 75mm f2 $2,200.00 Time Remaining: 23d 5h 49m Buy It Now for only: $2,200.00 Buy It Now | Add to watch list |
![]() Taylor Hobson Super Comat 25mm C mount f 19 25mm Lumix GH PEN 4 3 ARRI VBMC $116.57 Time Remaining: 6d 6h 26m Buy It Now for only: $116.57 Buy It Now | Add to watch list |
![]() RARE LEICA LEITZ XENON TAYLOR HOBSON 50mm f15 CANON NIKON NEX PEN MICRO 4 3 $700.00 Time Remaining: 17h 22m Bid now | Add to watch list |
![]() Taylor Hobson Cooke Kinetal 50mm T2 f 18 arriflex $725.00 Time Remaining: 25d 4h 41m Buy It Now for only: $725.00 Buy It Now | Add to watch list |
![]() Leica SM 50 15 Summarit 820385 $675.00 Time Remaining: 9d 21h 8m Buy It Now for only: $675.00 Buy It Now | Add to watch list |
![]() Taylor Hobson Cooke Speed Panchro 75mm ser II f2 T23 late arriflex $2,575.00 Time Remaining: 23d 5h 58m Buy It Now for only: $2,575.00 Buy It Now | Add to watch list |
![]() Taylor Hobson Serital 1 25mm f19 for 16mm movie NEX m4 3 Pentax Q $98.00 Time Remaining: 18d 21h 19m Buy It Now for only: $98.00 Buy It Now | Add to watch list |
![]() CAMEFLEX to SONY NEX E mount $149.00 Time Remaining: 20d 3h 48m Buy It Now for only: $149.00 Buy It Now | Add to watch list |
![]() Taylor Hobson Cooke Speed Panchro 50mm f 2 $1,350.00 Time Remaining: 20d 12h 38m Buy It Now for only: $1,350.00 Buy It Now | Add to watch list |
![]() Cooke Bell and Howell Super Comat 1 inch 25mm f 19 C mount lens CLEAN Micro 4 3 $135.00 Time Remaining: 26d 15h 57m Buy It Now for only: $135.00 Buy It Now | Add to watch list |
![]() Cooke 38mm f 2 Military Lens of Speed Panchro $51.00 (11 Bids) Time Remaining: 1d 17h 56m Bid now | Add to watch list |
![]() Cooke Telekinic Anastigmat 75mm f 4 C Mount 4 3 Lumix G PEN Bolex 16mm VBMC $169.99 Time Remaining: 3d 3h 1m Buy It Now for only: $169.99 Buy It Now | Add to watch list |
![]() ARRI ARRIFLEX PL to SONY NEX E MOUNT $149.00 Time Remaining: 20d 5h 26m Buy It Now for only: $149.00 Buy It Now | Add to watch list |
![]() Very Rare National Optical 2inch f2 for Leica LTM fit M9 Taylor Hobson 007373 $2,590.00 Time Remaining: 27d 13h 16m Buy It Now for only: $2,590.00 Buy It Now | Add to watch list |
![]() C Mount Taylor Hobson 1 25mm f15 Cine Lens plasmat design 2 $239.00 Time Remaining: 20d 8h 44m Buy It Now for only: $239.00 Buy It Now | Add to watch list |
![]() Leica Leitz Xenon 5cm 50mm f 15 289946 Taylor Hobson MINTY 1st RUN RARE $1,500.00 Time Remaining: 22d 16h 56m Buy It Now for only: $1,500.00 Buy It Now | Add to watch list |
![]() Taylor Hobson Cooke Speed Panchro ser II 40mm f2 T 23 late Arriflex $1,500.00 Time Remaining: 25d 4h 42m Buy It Now for only: $1,500.00 Buy It Now | Add to watch list |
![]() TAYLOR HOBSON 50MM 250MM C MOUNT LENS BOLEX G1 GH2 WOW FULL COVERAGE ON 4 3 $299.00 Time Remaining: 18d 20h 30m Buy It Now for only: $299.00 Buy It Now | Add to watch list |
![]() TAYLOR HOBSON COOKE KINETAL 9mm T2 f 19 ARRIFLEX MOUNT LENS $399.00 Time Remaining: 2d 15h 26m Bid now | Add to watch list |
![]() Cooke Taylor Hobson 50mm kinetal original focusing for Leica M RF couple 6 bits $2,500.00 Time Remaining: 5d 8h 38m Buy It Now for only: $2,500.00 Buy It Now | Add to watch list |
![]() Taylor Hobson 2inch F2 Anastigmat Leica Fit Rangefinder Lens TTH Reid Rare $2,195.46 Time Remaining: 15d 15h 25m Buy It Now for only: $2,195.46 Buy It Now | Add to watch list |
![]() Cooke Brass Portrait Soft Focus 13in f 56 Series VI $1,595.00 Time Remaining: 21d 21h 19m Buy It Now for only: $1,595.00 Buy It Now | Add to watch list |
![]() Bell Howell Super Comat 26mm F19 m25 + m4 3 + Nex $195.00 Time Remaining: 4d 18h 2m Buy It Now for only: $195.00 Buy It Now | Add to watch list |
![]() Taylor Hobson 1 25mm f19 Beautiful Standard C mount Movie lens NICE $242.59 Time Remaining: 5d 8h 18m Buy It Now for only: $242.59 Buy It Now | Add to watch list |
![]() COOKE PORTRAIT ANASTIGMAT TAYLOR HOBSON 270mm f 45 Serie II e red paint $2,500.00 Time Remaining: 11d 8h 53m Buy It Now for only: $2,500.00 Buy It Now | Add to watch list |
![]() COOKE IVOTAL ANASTIGMAT 25mm F14 22 TAYLOR HOBSON $40.00 (2 Bids) Time Remaining: 3d 2h 55m Bid now | Add to watch list |
![]() TAYLOR HOBSON 33 12 120MM C MOUNT LENS BOLEX 16MM MOVIE CAMERA A BEAUTY $299.00 Time Remaining: 20d 22h 48m Buy It Now for only: $299.00 Buy It Now | Add to watch list |
![]() W1 type C mount lens to M4 3 M43 Micro 4 3 $44.50 Time Remaining: 20d 3h 59m Buy It Now for only: $44.50 Buy It Now | Add to watch list |
![]() Cooke Kinetal 50mm F18 Taylor Hobson ARRIFLEX Standard mount EOS RED $1,568.18 Time Remaining: 20d 15h 57m Buy It Now for only: $1,568.18 Buy It Now | Add to watch list |
![]() 7 mm FOCUS ON STROKE HELICOID M42 TO SONY E MOUNT TUBE $133.10 Time Remaining: 20d 2h 53m Buy It Now for only: $133.10 Buy It Now | Add to watch list |
![]() 21MM FOCUS ON STROKE HELICOID M42 TO SONY E MOUNT TUBE $164.00 Time Remaining: 20d 2h 53m Buy It Now for only: $164.00 Buy It Now | Add to watch list |
![]() TAYLOR HOBSON X2 WIDE ANGLE ATTACHMENT FOR VAROTAL III TV LENS AS IS $99.99 Time Remaining: 5d 8h 11m Buy It Now for only: $99.99 Buy It Now | Add to watch list |
![]() CAMEFLEX to M4 3 Micro 4 3 43 G1 $149.00 Time Remaining: 20d 5h 28m Buy It Now for only: $149.00 Buy It Now | Add to watch list |
![]() TAYLOR HOBSON LENS 15 INCH F19 AWESOME $49.99 Time Remaining: 3d 4h 16m Buy It Now for only: $99.99 Buy It Now | Bid now | Add to watch list |
![]() Rare Taylor Taylor and Hobson 25mm 19 C mount lens Ideal for Micro 4 3rds $94.08 Time Remaining: 23d 1h 26m Buy It Now for only: $94.08 Buy It Now | Add to watch list |
![]() Cooke Bell Howell Super Comat 7 inch 18mm f 25 C mount lens CLEAN Micro 4 3 $125.00 Time Remaining: 26d 16h 27m Buy It Now for only: $125.00 Buy It Now | Add to watch list |
![]() TAYLORTAYLORHOBSON 4 INCH f 4 COOKE TELEKINIC LENS $350.00 Time Remaining: 19d 5h 52m Buy It Now for only: $350.00 Buy It Now | Add to watch list |
![]() COOKE IVOTAL ANASTIGMAT 25MM 1 F14 C MT LENS TAYLOR HOBSON ENGLAND $969.99 Time Remaining: 11d 2h 28m Buy It Now for only: $969.99 Buy It Now | Add to watch list |
![]() Taylor Hobson 25mm f 15 Cine 16mm Lens C Mount plasmat design $249.00 Time Remaining: 20d 8h 6m Buy It Now for only: $249.00 Buy It Now | Add to watch list |
![]() Taylor Hobson 16 Series V Brass Lens 8x10 10x12 W Aperture Waterhouse Slot $799.99 Time Remaining: 7d 16h 21m Buy It Now for only: $799.99 Buy It Now | Add to watch list |
![]() TAYLOR HOBSON COOKE KINETAL 175mm T2 f18 ARRI LENS NR $999.00 Time Remaining: 22d 15h 50m Buy It Now for only: $999.00 Buy It Now | Add to watch list |
![]() TAYLOR HOBSON COOKE ANTISTIMAT LENS 18 Inch Series V B $75.00 Time Remaining: 3d 19h 57m Buy It Now for only: $175.00 Buy It Now | Bid now | Add to watch list |
![]() Taylor Hobson 50 14 Vivital 566793 Leica SM $5,000.00 Time Remaining: 11d 3h 58m Buy It Now for only: $5,000.00 Buy It Now | Add to watch list |
![]() TAYLOR AND HOBSON FRONT LENS CAP44 45MM $49.99 Time Remaining: 26d 8h 8m Buy It Now for only: $49.99 Buy It Now | Add to watch list |
![]() COOKE TELEKINIC 6 F 45 LENS C MT TAYLORTAYLORHOBSON $599.99 Time Remaining: 26d 10h 25m Buy It Now for only: $599.99 Buy It Now | Add to watch list |
![]() ARRIFLEX KINETAL f19 COOKE 9mm TAYLOR HOBSON T2 LENS $899.00 Time Remaining: 29d 18h 21m Buy It Now for only: $899.00 Buy It Now | Add to watch list |
![]() C Mount Lens to Micro 4 3 43 Panasonic Lumix G1 GH1 GF1 $47.33 Time Remaining: 18d 17h 4m Buy It Now for only: $47.33 Buy It Now | Add to watch list |
![]() Vintage Taylor Hobson 13 330mm f8 f64 Cooke Process Lens 58mm Mount $313.62 Time Remaining: 28d 21h 31m Buy It Now for only: $313.62 Buy It Now | Add to watch list |
![]() MS022 Taylor Hobson Cooke 8 Inch f 35 Telephoto Anastigmat Lens $98.95 (1 Bid) Time Remaining: 5d 3h 43m Bid now | Add to watch list |
![]() Taylor Hobson 575in 45 116627 $500.00 Time Remaining: 10d 14h 3m Buy It Now for only: $500.00 Buy It Now | Add to watch list |
![]() Rank Taylor Hobson 4in 4 642636 $1,100.00 Time Remaining: 10d 23h 51m Buy It Now for only: $1,100.00 Buy It Now | Add to watch list |
![]() W2 type C mount lens to NEX E mount $44.50 Time Remaining: 20d 3h 59m Buy It Now for only: $44.50 Buy It Now | Add to watch list |
![]() Taylor Hobson unmark focal length f54 $500.00 Time Remaining: 20d 5h 21m Buy It Now for only: $500.00 Buy It Now | Add to watch list |
![]() Taylor Hobson 8x5 RR 95in 8 4469 $385.00 Time Remaining: 10d 23h 51m Buy It Now for only: $385.00 Buy It Now | Add to watch list |
![]() Taylor Hobson Cooke 525in 25 Series X 156813 $1,100.00 Time Remaining: 15d 12h 25m Buy It Now for only: $1,100.00 Buy It Now | Add to watch list |
![]() Reid Taylor Hobson 2in 2 Coll LSM 328882 $2,650.00 Time Remaining: 1d 13h 30m Buy It Now for only: $2,650.00 Buy It Now | Add to watch list |
![]() HUGE COVERAGE COOKE SERIES IX 25 F10 PROCESS BRASS LENS ULF 8X10 11X14 7X17 ETC $56.00 (6 Bids) Time Remaining: 5d 22h 44m Bid now | Add to watch list |
![]() Rank Taylor Hobson 4in 4 689002 Minty $1,550.00 Time Remaining: 6d 11h 52m Buy It Now for only: $1,550.00 Buy It Now | Add to watch list |
![]() LEICA ANASTIGMAT TAYLOR HOBSON f2 2 INCH SM RARE M39 NR $2,299.00 Time Remaining: 14d 8h 24m Buy It Now for only: $2,299.00 Buy It Now | Add to watch list |
![]() Taylor Hobson 2in 2 Amotal 301005 Leica SM $1,500.00 Time Remaining: 14d 6h 32m Buy It Now for only: $1,500.00 Buy It Now | Add to watch list |
![]() Taylor Hobson 5in 39 119433 $500.00 Time Remaining: 15d 8h 7m Buy It Now for only: $500.00 Buy It Now | Add to watch list |
![]() Taylor Hobson Cooke 65 in 25 Anastigmat 157918 $1,875.00 Time Remaining: 23d 7h 27m Buy It Now for only: $1,875.00 Buy It Now | Add to watch list |
![]() 16 MM TV Bolex C mount to SONY NEX E MOUNT $39.00 Time Remaining: 20d 2h 52m Buy It Now for only: $39.00 Buy It Now | Add to watch list |
![]() Taylor Hobson 2in 2 Amotal 301994 Leica M $1,475.00 Time Remaining: 14d 1h 24m Buy It Now for only: $1,475.00 Buy It Now | Add to watch list |
![]() For digital SLR M42 TH Cooke Speed Panchro 75mm 20 Ser Excellent condition $560.00 (27 Bids) Time Remaining: 7d 16h 32m Bid now | Add to watch list |
![]() TAYLOR HOBSON 4 1 4 inch ENTAL II F 45 CAPS BOXED LENS $399.00 Time Remaining: 12d 13h 48m Buy It Now for only: $399.00 Buy It Now | Add to watch list |
![]() Taylor Hobson Cooke Kodak 178 45 121219 $625.00 Time Remaining: 15d 47m Buy It Now for only: $625.00 Buy It Now | Add to watch list |
![]() Cooke Taylor Hobson 12in 4 T mount 492992 $2,150.00 Time Remaining: 14d 4h 39m Buy It Now for only: $2,150.00 Buy It Now | Add to watch list |
![]() COOKE ANASTIGMAT TELEPHOTO 11 280MM SERIES VIII F56 LENS TAYLOR HOBSON 266433 $1,495.00 Time Remaining: 20d 8h 23m Buy It Now for only: $1,495.00 Buy It Now | Add to watch list |
![]() TV Bolex C mount to PENTAX Q $39.00 Time Remaining: 20d 3h 59m Buy It Now for only: $39.00 Buy It Now | Add to watch list |
![]() Bell Howell Taylor Hobson 1 Inch 25mm f 19 $250.00 Time Remaining: 17d 4h 38m Buy It Now for only: $250.00 Buy It Now | Add to watch list |
![]() Cooke Panchrotal Anastigmat 28 F23 71mm Taylor Hobson C Mount Cinema lens $5.50 (6 Bids) Time Remaining: 9d 56m Bid now | Add to watch list |
![]() C Mount Lens to Micro 4 3 43 Olympus E P1 EP1 1 Adapter $47.33 Time Remaining: 18d 16h 4m Buy It Now for only: $47.33 Buy It Now | Add to watch list |
![]() TAYLOR HOBSON 6 inch ENTAL II F 45 CAPS BOX LENS MINT $599.00 Time Remaining: 12d 13h 48m Buy It Now for only: $599.00 Buy It Now | Add to watch list |
![]() TAYLOR HOBSON COOKE KINETAL 9mm T2 f 19 ARRIFLEX MOUNT $700.00 Time Remaining: 23d 19h 58m Buy It Now for only: $700.00 Buy It Now | Add to watch list |
![]() Taylor Hobson 150 38 Cooke Kinetal 667962 Nikon $1,875.00 Time Remaining: 15d 3h 37m Buy It Now for only: $1,875.00 Buy It Now | Add to watch list |
![]() COOKE TELEKINIC ANASTIGMAT 3 INCH F4 C MOUNT LENS $329.99 Time Remaining: 27d 6h 27m Buy It Now for only: $329.99 Buy It Now | Add to watch list |
![]() Taylor Hobson Cooke 65 in 25 Anastigmat 157684 $2,000.00 Time Remaining: 23d 7h 37m Buy It Now for only: $2,000.00 Buy It Now | Add to watch list |
![]() Taylor Hobson Cooke 65 in 25 Anastigmat 133067 $2,425.00 Time Remaining: 23d 7h 29m Buy It Now for only: $2,425.00 Buy It Now | Add to watch list |
![]() ARRIFLEX KINETAL COOKE 9mm TAYLOR HOBSON T2 LENS $400.00 Time Remaining: 9d 5h 34m Bid now | Add to watch list |
![]() ARRI ARRIFLEX PL to M4 3 Micro 4 3 43 G1 $149.00 Time Remaining: 20d 5h 26m Buy It Now for only: $149.00 Buy It Now | Add to watch list |
![]() STANDARD STD ARRI ARRIFLEX to SONY NEX E mount $149.00 Time Remaining: 20d 2h 52m Buy It Now for only: $149.00 Buy It Now | Add to watch list |
![]() 30 MM FOCUS ON STROKE HELICOID M54 TO HASSELBLAD $228.80 Time Remaining: 20d 2h 52m Buy It Now for only: $228.80 Buy It Now | Add to watch list |
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![]() STANDARD STD ARRI ARRIFLEX TO LEICA M ADAPTER $149.00 Time Remaining: 20d 2h 51m Buy It Now for only: $149.00 Buy It Now | Add to watch list |
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![]() Taylor Hobson 1 inch f 19 C Mount Lens great example very clean $229.00 Time Remaining: 21d 7h 2m Buy It Now for only: $229.00 Buy It Now | Add to watch list |
![]() Lens Taylor Hobson 50mm M405 England made $9.99 Time Remaining: 3d 15h 39m Bid now | Add to watch list |
![]() 21 mm FOCUSING HELICOID M42 TO M 43 MICRO 4 3 $164.00 Time Remaining: 20d 3h 53m Buy It Now for only: $164.00 Buy It Now | Add to watch list |
![]() Taylor Hobson f Hasselblad 4 406mm 16 inch Ortal $3,987.00 Time Remaining: 10d 18h 50m Buy It Now for only: $3,987.00 Buy It Now | Add to watch list |
![]() 14MM FOCUS ON STROKE HELICOID M42 TO SONY E MOUNT TUBE $149.00 Time Remaining: 20d 2h 53m Buy It Now for only: $149.00 Buy It Now | Add to watch list |
![]() TAYLOR HOBSON COOKE PROCESS ANASTIGMAT 18 INCH F10 SERIES V 5 B VIEW CAMERA LENS $1,249.99 Time Remaining: 8h 4m Buy It Now for only: $1,249.99 Buy It Now | Add to watch list |
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![]() TAYLOR HOBSON 3 1 4 inch ENTAL II F 4 BOX CAPS LENS NR $399.00 Time Remaining: 12d 13h 48m Buy It Now for only: $399.00 Buy It Now | Add to watch list |
More Great Information on Taylor Hobson:
Surface Roughness and Slip Risk Assessments by Louise G
The surface roughness value, specifically Rz, describes the average vertical distance, in microns, between valleys and peaks across a horizontal sample. The measurement is achieved by use of a surface roughness meter of which there are many commercially available. The meter drags a sprung diamond stylus slowly across the floor surface measuring vertical displacement as it goes. Grip Potential use a Surtronic Duo surface roughness meter available from Taylor Hobson. The micro-roughness of a surface has a significant impact on its slip resistance. This is due to a phenomenon known as hydraulic uplift created by the hydrodynamic squeeze film. When a slip occurs in contaminated conditions the heel slides across the surface, compressing the fluid. If the surface is sufficiently rough the fluid disperses into the valleys and the peaks ensure a good sole/floor contact. If the surface is insufficiently rough the sole is unable to make contact with the floor due to the fluid film and friction is significantly reduced. Sampling and Results As surface roughness measurement gives an indication of the expected behaviour in a wet slip rather than measuring slip resistance directly it should be considered as supporting information rather than a slip test in its own right. The UKSRG offer the following classifications for surface roughness to be used in conjunction with pendulum testing; 20µm Low slip potential HSE issued guidance suggests a sampling area of 'a typical tile size'. Measurements are taken in the direction of, at 45 degrees to and perpendicular to the direction of foot traffic with a total of 10 measurements recorded. Further investigation into surface roughness measurement by the UKSRG has prompted a different sampling recommendation. Measurements should be conducted within an area 75mm x 75mm and taken randomly on surfaces without obvious directionality or along/across a directional surface to demonstrate anisotropism. It is also noted that the significant variability of a floor surface may deem 10 measurements an insufficient sample. In the case of significant variability 20 measurements will provide a more accurate average.
Surface roughness measurements are used widely to give an indication of slip risk on their own or as supporting evidence in pendulum testing. Some of the advantages of this method are that; Roughness measurement will give an indication of slip risk with water based contamination. Roughness meters are generally quick and easy to use and require no training. Commercially available meters will normally cost around £1,000, significantly cheaper than alternative test equipment. Roughness measurement can show significant changes to the surface, highlighting problems with wear, contamination or cleaning. When married to pendulum test data surface roughness can be used to predict PTV's of surfaces wearing over time, allowing an inexpensive monitoring regime.
It should be stressed that surface roughness measurements can be considered a guide only. As a slip resistance test method there are serious shortcomings; Floors of similar Rz reading may have significantly different surface construction and slip resistance characteristics. Independent testing by the HSE has shown that risk classification based on surface roughness measurement is often inaccurate. Generally it is not possible to measure surface roughness of macro profiles.
Surface roughness measurements are most effective when used alongside pendulum slip testing to provide additional information about the floor surface. The HSE have produced the following giving guidance on the roughness required to provide safe levels of grip on floors with contamination of varying viscosity; Rz>20µm - Water based Rz>45µm - Soap solution, milk Rz>60µm - Cooking stock Rz>70µm - Motor oil, olive oil Rz>>70µm - Gear oil, margarine The HSE have produced a Slips Assessment Tool (SAT) based around the Slips Potential Model and surface roughness measurement. The SAT is a freely available computer program designed to be run on a laptop whilst assessing the test site. The SAT enables novices to highlight high risk areas; however its basis in Rz measurement limits its accuracy. The SAT can be downloaded from www.hse.gov.uk/slips Conclusion Surface roughness properties have a significant impact on a floor's contaminated slip resistance. Currently, Rz measurements fail to take into account surface configuration and as such can only produce a limited indication of slip resistance. Measurements are further limited on macro profiled surfaces where surface contact, interlock and deformation of footwear alter slip resistance. When used alongside pendulum testing however, surface roughness can be used to predict PTV's on similar surfaces, allowing fast, cheap and easy long term monitoring of wear, cleaning regime and contamination.
Copyright (c) 2010 Ianson Internet Marketing
Louise G is a prolific business author and business consultant. Louise has been instrumental in the development of successful marketing strategies for many leading internet businesses. Examples of Louises work can be found at http://www.grip-potential.com/index.htm for slip risk assessments
Article Source: http://www.earticlesonline.com/Article/Surface-Roughness-and-Slip-Risk-Assessments/735654
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