Bọọlụ ịghasa, nke otu n'ime classifications nke igwe ngwá ọrụ bearings, bụ ezigbo igwe ngwá ọrụ amị ngwaahịa nke nwere ike tọghata rotary ngagharị n'ime linear motion.Ball ịghasa mejupụtara ịghasa, nut, reversing ngwaọrụ na bọl, na o nwere àgwà nke elu. nkenke, ngbanwe na...
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