The emergency escape device for high rise building consists of jack ladder, guide track, chain wheel, speed varying mechanism, hydraulic speed regulating controller, etc.

本发明是一种高层建筑遇险时紧急逃生装置，也是一种理想的消防设施。该装置主要由链梯、导轨基架、链轮、变速机构、液压调速式控制器等组成。

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Chief Executive Jack Welch has some blunt words for women climbing the corporate ladder: you may have to choose between taking time off to raise children and reaching the corner office.

前首席执行长杰克·韦尔奇(Jack Welch)对那些在职场上为升迁而打拼的女性提出了一些直言不讳的忠告：你可能不得不在暂时停止工作在家带孩子和进军高管行列之间作出选择。

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