塔式起重机安全技术规范浅析——我国现行塔式起重机的技术规范大部分是90年代颁发的,纵观现状,国内生产的各类塔机与之相对照,尚有一定的差距,主要表现在安全装置不全、辅助机构欠缺等问题。如有的缺少卷筒防脱绳装置;有的缺少变幅小车断轴防坠装置;有的缺...
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