... 承雨斗外排水 external drainage of rainwater hopper 天沟排水 gutter drainage 半有压屋面雨水系统 roof rainwater system of halfpressure flow ...
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The square gutter in- let should arrive at the drainage, meanwhile, it should be harmonious with the total style and the outstandings.
广场雨水口在达到排水目的的同时，还要与广场整体风格、环境协调一致。
Stem steam leakage from main stop valve and governor valve, drainage of front and rear steam sealing, etc shall all be directed into the conduit, and then be discharged into the gutter.
主汽门阀杆及调节汽阀阀杆漏气，前后汽封疏水等都引入集水管再排入地沟。
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