短語詞組短語upset hutt welding 電阻對焊接頭upset -welding 電阻對焊Upset Bull Welding 鐓焊upset butt welding 電阻對接焊;端壓對頭焊接;電阻對焊接dc upset butt welding 直流電阻對焊resistance upset welding 電阻對焊high frequency upset welding 高頻電阻焊UW upset welding 電阻對接焊upset welding standards 焊接規(guī)范 返回 upset welding