... , they have rubber refine machine, precision performer, vacuum vulcanizing press, injection machine, frozen trimming machine, automatic oil seal lip lathe, ... aging tester, tensile tester, hardness tester, high temperature oil resistance tester.- Rubber products could be any type: ... bakelite, polyoxymethylene etc1. Mechnical Oil-seal Skeleton oil seal, U -oil sea, J-oil seal, L-Oil seal, V-ring, Y-ring ...