Please explain the method of field test and flushing (blowing off) of the pipelines.
请说明管线的现场试验和冲洗(吹净)方法。
Please explain the method of field test and flushing(blowing off )of the pipelines.
请申明管线的现场试验以及冲刷（吹净）要领。
What's to be done after water pressure test? Acid flushing or galvanizing?
水压试验后怎么处理，是酸洗还是镀锌？
What's to be done after water pressure test? Acid flushing or galvanizing?
水压试验后怎么处理，是酸洗还是镀锌？
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