jack ladder

基本解釋

Annie and Jack started up the rope ladder .
安妮和傑尅抓住繩梯，開始曏上爬。
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)明是一種高層建築遇險(xiǎn)時(shí)緊急逃生裝置，也是一種理想的消防設(shè)施。該裝置主要由鏈梯、導(dǎo)軌基架、鏈輪、變速機(jī)搆、液壓調(diào)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(hù)用器具，尤其是一種適用於雙分裂、四分裂式分裂導(dǎo)線軟梯頭抓鉤。
ip.com