跨越电气化铁路施工时,须经批准并与供电设备()签订施工安全协议,在接触网停电并做好安 发布时间:2017-10-23 16:04 │ 来源:www.tikuol.com 题型:单项选择题 问题: 跨越电气化铁路施工时,须经批准并与供电设备()签订施工安全协议,在接触网停电并做好安全防护措施后进行。A.管理单位B.主管部门C.管理部门D.管理站段
题型:单项选择题 A chain bridle is used when towing astern because it().A.Is easy to connectB.Provides an effective catenary and absorbs shock due to its weightC.Makes rigging a swivel unnecessaryD.Prevents the tow from yawing by the drag of the chains in a seaway 查看答案