Design experience of water supply and drainage pipeline project is introduced in the paper.
本文介绍了石油化工企业给水排水管道工程的设计经验。
The cast iron pipe is used for water supply, drainage and gas transmission pipeline.
铸铁管用于给水、排水和煤气输送管线，它包括铸铁直管和管件。
The cast iron pipe is used for water supply, drainage and gas transmission pipeline.
铸铁管用于给水、排水和煤气输送管线，它包括铸铁直管和管件。
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