几十年来，美国国家标准学会设计的ANSI法兰已经为石油和天然气工业提供了壹种适用的密封技术，而且卓有成效。

For decades, American national standards institute ANSI flange design has been for the oil and gas industry is provided one of the sealing technology, and effectiveness.

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几十年来，美国国家标准学会设计的ANSI法兰已经为石油和天然气工业提供了一种适用的密封技术，而且卓有成效。

For decades, the American National Standards Institute ANSI flange design for the oil and gas industry provides a seal applied technology, and effective.

youdao