pit depth
... capacity 载重,容量,定员 loading 负载，负荷 pit depth 底坑深度 traction ratio 曳引比 ...
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主机和控制系统可安装于任何楼层，所需的顶层高度更低、底坑深度更小，大大减轻建筑施工难度。
The traction machine and control system can be installed in any floor, the top floor height and pitch depth can be lower and smaller. It will greatly reduce the construction difficulty.
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