The emergency escape device for high rise building consists of jackladder, guide track, chain wheel, speed varying mechanism, hydraulic speed regulating controller, etc.
Meanwhile, a demoted Jack tangles yet again with Nemesis Devin Banks (Will Arnett) as he tries to climb back up the corporate ladder at 30 Rock.
同时，一个降级杰克缠结再次和克星德文银行(威尔·阿奈特)当他试图爬上梯子在30岩。
3
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.