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車床用的活動頂尖經常磨损,以前必須把頂尖拆下才能修理,拆装很費工時,安裝又不易找正,致使頂針與套筒不同心。
Lathe activities with the top wear often removed before the top must be removed to repair, disassembly is labor-intensive, installation is not easy to find, resulting in different thimble and sleeve.