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本文讨论了目前现场广泛使用的KJ型提升机产生过卷的条件、原因和相应的防治措施。对制动闸失灵而造成的过卷事故提出了防治对策
This article discusses the conditions, causes and corresponding prevention and cure measures of the KJ-type hoist widely used on the spot. Preventive measures against rolling over accident caused by brake failure