这是一根长1.5米的空心圆柱状设备，可以利用升降机穿梭于液压挖掘机打通的给养通道。
This is a 1.5 m long hollow cylinder apparatus, can use the elevator shuttle to hydraulic excavator through food channel.
“升降机在那儿，但就是不用，”他说，“因为我们有电梯，使用升降机将必须关闭楼梯通道”。
"It's there but it's not used," he said. "We have the elevators and to use (the lift) the stairs have to be closed off."
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