marking thread 标记用线 ; 标志线
Thread dimensional specifications, minimum wall thickness and burst pressure, material classification, and requirements for marking identification were stipulated.
螺纹尺寸规格说明，最小壁厚和爆裂压力，材料分类，以及规定的标记标识的要求等。
Dimensions, thread gaging, minimum wall thickness and burst pressure, material classification, various quality aspects and requirements for marking identification are stipulated.
尺寸，螺纹规，最小壁厚和爆裂压力，材料分类，各种质量要求和所规定的标记和标识要求等。
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