N'otu aka ahụ nke arụrụ ya dị ka mgbanaka bọọlụ, roller bearings nwere kọntaktị ahịrị kama ịtụrụ aka, na-eme ka ikike dị ukwuu na nguzogide ujo dị elu.Rollers n'onwe ha na-abịa n'ụdị dị iche iche, ya bụ, cylindrical, spherical, tapered, na agịga.Cylindrical roller bearings jikwaa o...
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