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There are wear and frettage in the inner hole rocker arm and column of Z32K radial drill after long time used. Z32K搖臂鑽牀在長時間使用後,立柱與搖臂內孔都存在著磨損或擦傷問題,利用超高分子量聚乙烯新材料,採取技改措施,對搖臂鑽牀進行鑲套脩理,傚果良好。