welded的音标：welded的英式发音音标为：['weldɪd]welded的美式发音音标为：['weldɪd]...

weld的现在进行时为：welding...

weld的一般过去时为：welded...

backweld的音标：backweld的英式发音音标为：['bækweld]backweld的美式发音音标为：['bækweld]...

Welding is one of the important technologies in impellers " artifactitious . "焊接是 叶轮 加工的重要工艺之一.The welding conditions should always be neutral or slightly oxidizing.焊接气氛必须永远保持中性或微氧化.The welding is so smooth that you can ...