It was, however, not until 1979 and 1983 that the friction reducer began to be industrially applied in crude oil and oil products pipelines respectively.
但到1979年和1983年才分别在原油管线和成品油管线上得到工业性应用。
The company’s products include pipelines and risers used in underwater oil-field operations.
该公司的产品包括油田水下作业所用的管道和立管。
The company's products include pipelines and risers used in underwater oil-field operations.
该公司的产品包括油田水下作业所用的管道和立管。
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