sound groove 中文意思是什麼
sound groove
解釋
聲槽-
4 double - welded groove joints shall have their root passes back gouged to sound metal on the reverse side before proceeding with welding on that side
雙面焊接的坡口焊道,應在焊接前將該面底部焊道逆向刨削,直到其對面露出完好的金屬。
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