布里斯托尔都会区有没有做服务的地方【学生妹同城上门网址(i98x.com)】 - Pinterest
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Zhang Bao,迎新卡拉斯 production supervisor of CNOOC's "Shenhai No. 1" gas field: After we send the pigging ball into the sea pipeline , we will adjust and control the flow direction and pressure of the medium in the pipeline, so that the pigging ball will travel according to the operation plan and monitor it through sensors "Through the ball" process.