deck twin crane  并列式甲板起重机

twin crane  双倍场吊

twin hook hoist  双钩绞车

twin-hook hoist  双钩倒链

twin-twin transfusion syndrome  双胎输血综合征

Crane Hook  起重机吊钩; 起重吊钩; 起重机钩

single-beam electric hook crane  电动单梁吊钩起重机

ship with twin propellers and twin rudders  双桨双舵船舶

Twin to twin transfusion  双胎间输血

twin wheel twin nozzle type turbine  双轮双喷嘴式水轮机

twin-to-twin transfusion syndrome  双胎输血综合征

clasp hook [= clip hook  夹钩; 对扣钩

hook and hook turnbuckle  双钩伸缩螺丝

Switchover between one hook and two hook operation  单/双钩转换使用

gantry crane with jib crane  带悬臂吊车的龙门起重机

gantry crane with level luffing crane  带俯仰式吊车的龙门起重机

overhead crane and gantry crane  桥门式起重机

overhead crane or gantry crane  起重机

single-rail crane (mono-rail crane)  单轨起重机