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现有高层建筑的窗户不利于对外面玻璃的擦拭,为了擦拭窗户外面玻璃,人们必须把手伸到窗外,甚至将身体探出窗外,不但麻烦,而且十分危险,稍有不慎就会造成跌伤及人身事故.
The windows of existing high-rise buildings are not conducive to the wiping of the outside glass. To wipe the glass outside the windows, people must put their hands out of the window, or even lean their bodies out of the window. This is both troublesome and very dangerous. A slight carelessness can cause falls. Personal accidents.