wettiend
@wettiend
4年前ジャニラブポイント： 7
Metal bearing balls are manufactured from steel wire or rod. During the first step in the process, the wire or rod is cut into small pieces called slugs. The volume of material for the slug is slightly larger than that of the finished ball. The excess material is removed in subsequent machining steps. At this stage, the material has not […] 表示
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