常見例句雙語例句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(shè)施。該裝置主要由鏈梯、導(dǎo)軌基架、鏈輪、變速機構(gòu)、液壓調(diào)速式控制器等組成。ip.comThe 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(dǎo)線軟梯頭抓鉤。ip.com 返回 jack ladder