在平时的杂物电梯检验工作中，发现驱动主机无法进行维护保养、轿顶作为检修空间、非公众区域门锁设置、安全钳不能完全可靠动作等缺陷，通过对驱动主机布置、轿顶作业、门锁设置要求、安全钳动作原理，结合技术规范对产生的原因进行分析，得出在杂物电梯制造、安装和维护时所需要注意的重要事项，以加强杂物电梯的安全。%In service lift detection, it is found that the lift machine can't be maintained, the car roof is used as the repair space, non-public area door lock and the safety tongs can't act totally reliably. Through analysis of lift machine arrangement, car roof operation, door lock setting requirements, safety tong action principle, the causes are analyzed combined with technical specifications, and the matters needing attention in manufacturing, installation and maintenance of service lift, so as to enhance the safety of service lift.
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机译：工作室sull'evoluzione della concentrazione nell'industria della costruzione de macchine non elettriche in Italia。 Costruzione di materiale per sollevamento e trasporto。 Costruzione di ascensori =研究意大利非电机制造中的浓度变化。物料搬运设备的制造。电梯的制造。研究：集中和竞争系列的演变
