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【Daily Question】Utilities - Water Supply and Drainage - 20190822

2019-08-22View Original

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This post was last edited by hesonchang214 on 2019-8-24 08:58. The diameter of the distribution pipes, from the main pipelines in the piping network to the users and fire hydrants, should be at least (    ) mm. a、80   b、100   c、120   d、150 Answer: b

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