excavation是指开挖吗? excavation that do not require welding shall have side walls smoothly blended into the surrounding metal such that a slope of 10 degrees from the horizontal axis (pipe or plate) is not exceeded. the bottom of the excavation shall be prepared to a smooth basis. 觉得 excavation 可以翻译为‘开槽’ , 就是在管子或者钢板上挖一道槽。 (供参考) 不需要焊接的槽口槽壁要与周围金属表面平滑相接,使槽壁相对于管子或钢板水平轴的斜度不超过10度。槽口底面要打磨光滑。查看更多