a-frame crane

基本解释

Normally, loader crane dealers custom-fit a frame of steel bar on top of a truck chassis to mount the crane.
通常，装载起重机经销商随俗地在卡车底盘顶部设置铁杆梯架登上起重机。
iask.sina.com.cn
In a crawler crane of the present invention, a plurality of winches 11-14 for winding wire ropes are disposed on a rotating frame 6 of an upper rotating body 3 in a row in a plane view.
本发明的履带式起重机在上部旋转体（3）的旋转框架（6）上，在俯视图中前后排成一列地设置有卷绕作业用绳索的多个绞盘（11～ 14）。
ip.com
Floating crane structure mainly include boom, amplitude varying wire rope, tied back wire rope, truss frame, A-frame, counterweight box, rotating machinery base, and rotary bearing structure.
浮吊结构包括臂架、变幅钢丝绳、系固钢丝绳、桁框架、人字架、配重箱、回转底盘总成及回转支承等部件。