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永平铜矿采矿场ＷＫ－４型挖掘机是太原重型机械厂生产的 中型单斗正铲挖掘机，是永平铜矿重要的采剥设备之一。１９７８年投入生产以来，挖掘机推压减速箱漏油相当严重，造成单耗急剧上升，我场曾多次组织有关技术人员进行技术攻关，都未取得明显效果。为了配合创建“无泄漏工
Yongping Copper Mine WK-4 excavator is a medium-sized single-bucket shovel shovel produced by Taiyuan Heavy Machinery Factory and one of the important stripping equipment in Yongping Copper Mine. Since it was put into production in 1978, the excavator pushed the gearbox very seriously and caused a drastic increase in unit consumption. My field has repeatedly organized relevant technical personnel to conduct technical research and did not achieve any significant results. In order to cooperate with creating "leak-free workers