第一步就是用小石子排满排水区域，这样管理员就可以避免在用水管冲洗地面的时候把沙石冲到排水沟里面。
The first step was to line the drain area with small stones. This enables the keeper to hose the small stones covering the concrete without the stones washing into the drain.
在它的下面应当有一个高出地面的铁丝网，地板上没有排水沟。
A raised wire frame should be placed under it with a drain provided in the floor.
这样管理员就可以避免在用水管冲洗地面的时候把沙石冲到排水沟里面。
This enables the keeper to hose the small stones covering the concrete without the stones washing into the drain.
这样管理员就可以避免在用水管冲洗地面的时候把沙石冲到排水沟里面。
This enables the keeper to hose the small stones covering the concrete without the stones washing into the drain.
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