短語詞組短語welding linear heat input 焊接線能量welding heat input control 焊接線能量控制low heat input welding 低熱輸入焊接法High Heat Input Welding 大線能量焊接critical heat of welding input 臨界焊接熱輸入high -heat input welding steel 大線能量焊接用鋼 返回 welding heat input