Portable fire escape ladder for homes/apartments with multiple floors.
用于多层建筑物的便携逃生梯
In the capture trails system a multi-level ring ladder type of multiple-order computers is adopted.
该系统采用多层环阶梯式多级计算机控制。
In the capture trails system a multi-level ring ladder type of multiple-order computers is adopted.
该系统采用多层环阶梯式多级计算机控制。
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