What is the principle of marginal rays in optics? - marginal rays
Fresnel lens
Fresnellight
NLGI Grade 2 - Silicone-based grease with a base oil viscosity of 76 cSt at 40°C, lithium-thickened, with no solid lubricants.
Lubrication between rubber and metal parts in pneumatic systems in aircraft, automotive and general industrial applications.
Silicone-based material that helps ensure positive lubrication and sealing by slightly swelling rubber O-rings and seals. This product is heat-stable and oxidation-resistant.
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