fixed position weldingpositioned weld(welding)positioned weldingstitch weldingtacking runtw tack welding定位: fixed position; location; or ...焊: weld; solder定位焊点: tack welding; tacked spot定位焊缝: tack weld定位焊机: tack welder下载手机词典可随时随地查词查翻译