什么叫啃轨?啃轨有哪些危害?
下列不属于客户维护方法中的上门维护的是()。 ["上门取单、送单","提供咨询服务","推销银行金融产品","关注并随时解决客户在日常生活中遇到的困难"]
下列属于并购的动因有() ["谋求管理经营和财务上的协同效应","开展多元化经营","获得规模经济","降低代理成本"]
In towing,chocks are used to(). ["protect the towline from chafing","secure the end of the towline on the tug","stop off the towline while retrieving it","absorb shock loading on the towline"]
扑救封闭舱室中的火灾,必须将门全部打开,并以门作为掩体用水雾流前后来回交叉喷扫舱室。
起重机电器连锁保护装置有哪些?