jack ladder

基本解釋

Annie and Jack started up the rope ladder .
安妮和杰克抓住繩梯，開始向上爬。
The emergency escape device for high rise building consists of jack ladder, guide track, chain wheel, speed varying mechanism, hydraulic speed regulating controller, etc.
本發(fā)明是一種高層建筑遇險時緊急逃生裝置，也是一種理想的消防設施。該裝置主要由鏈梯、導軌基架、鏈輪、變速機構、液壓調速式控制器等組成。
ip.com
The invention relates to an apparatus used for maintaining a transmission facility, in particular to a jack ladder grapnel suitable for double-cracking type and four-cracking type divided conductors.
本發(fā)明涉及一種輸電線維護用器具，尤其是一種適用于雙分裂、四分裂式分裂導線軟梯頭抓鉤。
ip.com