Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
Inventor
active
Composite material of metal and rubber
Composite material of metal and rubber for use in industrial rub
Epoxidized or graft-copolymerized natural rubber composition...
Epoxidized or graft-copolymerized natural rubber composition...
Friction test apparatus
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