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【Daily Question】Utilities - Mechanical & Electrical - 20191105

2019-11-05View Original

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This post was last edited by hesonchang214 on 2019-11-5 06:50. The \"Code for Design of Town Gas Systems\" GB50028 classifies gas pipelines according to pressure into ( ).    A. Level 3 B. Level 4 C. Level 5 D. Level 6 Answer: B

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