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百花岭选矿厂于1996年底装用一台PXZ1200／60液氏族回破碎机。但从装机开始液压部及氢气缸常出现一些不正常现象，氢气缸氮气泄漏、单向截止阀损坏被压油窜流到润滑油中；动锥上移（200mm）、旅回堵死且动推不能回到原位（液压油压力为军时）；液压缸铜套拉伤（深达0．3～0．5m
Baihuiling concentrator at the end of 1996 equipped with a PXZ1200 / 60 liquid clan back to crusher. But from the beginning of the installation of hydraulic and hydrogen cylinder often some unusual phenomenon, hydrogen cylinder nitrogen leak, one-way stop valve is damaged by the oil pressure channeling into the oil; moving cone up (200mm), travel back to blocking and moving Push can not return to the original position (hydraulic oil pressure for the army); hydraulic cylinder copper sheath strain (as deep as 0.3 ~ 0.5m