排放管道和试验阀门体腔内的空气或蒸汽。
Vent the piping and test valve body cavity to remove air or steam.
按照规程的要求，排出安全阀气隙和排放管道的空气。
Vent the air gap and drain line from the relief valve in accordance with code requirements.
而这些排放物经由废物排放管道而直接排入河流，她补充道。
The runoff flows directly into the river via waste pipes, she added.
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