tube protusion是什么? The tube protusion shall be machined down until the contact between tube face and the upper weld toe . 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. tube protusion 是指管道的什么? upper weld toe 是 上部焊接支脚? gets lose 该如何翻译? 另外,蓝色那句又该怎么理解呢? 请教各位了! [ ]查看更多5个回答 . 5人已关注