The （）(双杆联吊) is that two booms are used with a single hook.A、derrickB、union purchaseC、topping lift blockD、crane
The （）(双杆联吊) is that two booms are used with a single hook.
- A、derrick
- B、union purchase
- C、topping lift block
- D、crane
相关考题：
双杆作业卸货,若吊货钩已挂好货物,则两吊货索的操作顺序应为________。①松大关吊货索;②绞大关吊货索;③绞小关吊货索同时松大关吊货索;④松小关吊货索和大关吊货索。 A.①②③④B.②③④C.①③④D.①②④
Cargo booms must be weight tested to recertify the Safe Working Load（SWL）every ______．A.YearB.Two yearsC.Four yearsD.Five years
The conventional cargo handling equipment is the union purchase.（）A、传统的装卸货设备是双杆联吊。B、传统的装卸货设备是重吊杆。C、传统的装卸货设备是克令吊。D、传统的装卸货设备是吊杆。
单选题The conventional cargo handling equipment is the union purchase.（）A传统的装卸货设备是双杆联吊。B传统的装卸货设备是重吊杆。C传统的装卸货设备是克令吊。D传统的装卸货设备是吊杆。
单选题（） are two vertical supports，usually steel，one each side of the centerline of the ship used to support booms.AShroudsBKing postsCStaysDTurnbuckles
单选题The （）(双杆联吊) is that two booms are used with a single hook.AderrickBunion purchaseCtopping lift blockDcrane
多选题以下属于专用的取物装置有（）A三角架吊具B调杠杆式吊具C起吊平放物体吊具D四杆式吊具E四杆机构吊具