“primary standard for OCTG threads”的概念、定义、翻译、参考文献-科学参考

单词	primary standard for OCTG threads
释义	primary standard for OCTG threads Encyclopedia 工学螺纹计量技术释 primary standard for OCTG threads石油螺纹参量计量基准用以复现和保存石油螺纹的量值。在中国是作为石油螺纹参量定值依据的测量装置。
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