The weld section looks like an inverted trapezia and the heat affect zone (HAZ) is very narrow.

 
  • 焊縫截面呈上寬下窄的倒梯形,熱影響區(HAZ)相當窄;
今日熱詞
目錄 附錄 查詞歷史
国内精品美女A∨在线播放xuan