搬家前设备拆卸程序是()。 ["下绞车、抽大绳、拆除机房设备","先拆机房再下绞车","抽大绳、下绞车、拆机房","下绞车、拆机房"]
每班施工结束后和离开机器时,司机应怎样操作?
内浮顶油罐在施工过程中要进行哪些试验?
输气管线穿越铁路时,宜采用()。 ["钢筋混凝土套管顶管施工","修建专用桥涵","在铁路上穿过","在铁路上架空管线"]
油泵吸油管管口形状和安装方向应该是(). ["平口朝下","斜口直向箱壁","平口朝上","斜口背向箱壁"]
当耙斗出绳方向和耙装的夹角过大时,司机应怎样操作?