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通常被错误地称为国家标准尺寸,以免与国家标准螺纹尺寸相混淆。
It is often incorrectly called National pipe Size, due to confusion with National pipe thread.
youdao
-
通常被错误地称为国家标准尺寸,以免与国家标准螺纹尺寸相混淆。
It is often incorrectly called National pipe Size, due to confusion with National pipe thread.
youdao