Pewag
Offers snow chains, gear-lifting chains, and drive chains.
http://www.pewag.com

Drives & Drives
Roller Chains, Sprockets, Couplers, Conveyor Chains, Slat Chains, Backstops, Precision Roller Chains, Heavy Series Roller Chains, Straight Sided Plate Chains, Standard Chains, Double Pitch Chains, Mayr Products, India
http://www.ddrives.com

Peerless Chains Company
Tire chains, traction cables or snow chains are manufactured at Peerless Chain. We manufacture chain for retail outlets.
http://www.peerlesschain.com

Kool Key Chains
Mini carabiner style keychains..Key chains and links that clip onto anything.
http://www.geocities.com/koolkeychains/

FLEXON GmbH
Steel flat top chains -chains with straight or special-purpose link plates
http://www.flexon.de/

B & S Chains
B&S Chains specialises in spares to help you maintain your playground to a high standard at affordable prices. All our products conform to BS EN 1176/7., U BOLTS, EYEBOLTS, SLINGS, B&S CHAINS, SWING SEATS, SWING CHAINS, PLAYGROUND SPARES AND EQUIPMENT, Our company specialises in spares to help you maintain your playground to a high standard at affordable prices. All our products conform to BS EN 1176/7. We hold stocks of most items and offer a very prompt service. Should you require a product which is not on our web site or have any queries please contact us on 01384 413088
http://www.bandschains.co.uk/

Velocity of Light
Light source (macrosource) is a set of elementary sources which have different velocities in relation to inertial frame of the macrosource. Elementary light which is emitted by an elementary source has a strictly fixed speed c in relation to that elementary source in the moment of emission. Hereby follows that the macrosource is emitting lights that have different speeds in relation to its own inertial frame. Elementary light detector can only detect the light that in relation to it has speed c. Just that kind of light is detectable in the inertial frame of the elementary detector. The constancy of speed of light is only related to the detectable light and it is exclusivly the consequence of the strict detectors selectivity. Change of relative velocity between the light source and the detector can`t effect the detectors selectivity therefore the light speed that we detect in the inertial detectors frame is always the same. But every time another light is detectable depending on that relative velocity.
http://www.beotel.yu/~svetlost/

Traction Tire Chains, LLC
Traction Tire Chains, LLC carry an extensive line of traction, tire chains and cable products.
http://www.tractiontirechains.com/

Ningbo Value FlashLight
Manufacturer and exporter of flashlight, book light, bicycle light, emergency light, head light and camping lantern.
http://www.led-flashlite.com

New Theory of Light and Introduction to Aumic Waves
A new theory on the nature of light which puts forward interesting explanations for the nature of light, electric and magnetic fields and the reason for the speed of light being constant.
http://www.geocities.com/natureoflight/