flash welding閃光焊學術名詞閃電熔接：機械工程、金屬材料閃光銲：電機工程火花對銲：電機工程閃銲：材料科學閃光焊：電力工程火花對焊：電力工程英文釋義butt welding by creating an electric arc between the two pieces which melts and joins them; used for joining segments of metal pipe