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。
This pipeline will be installed on the No. 8 pipe rack .
这条管线将安装于八号管廊架上。 。
The pipeline steel is mainly used in transmission pipe of oil and natural gas.
管线钢主要用于石油和天然气的输送。
The pipeline steel is mainly used in transmission pipe of oil and natural gas.
管线钢主要用于石油和天然气的输送。
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