tube protusion是什么? the tube protrusion shall be machined down until the contact between tube face and the upper weld toe. protusion 应该为protrusion，the tube protrusion通常指接管外伸，应结合上下文进一步理解；toe,指边缘． 初步译为：管子外伸端应向下加工到管子与上焊缝边缘结合面． this surface shall be recorded as starting test level. the examination shall proceed on repeated plane at 1 mm distance from each other till the tube gets lose. 该表面应记录为开始试验表面．在彼此１mm间隔的平面上继续该检查直到完成整根管子．查看更多
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