短语词组短語Butt Welding Neck Flange 帶頸對銲法蘭raised face welding neck flange 凸麪對銲法爛;凸麪對銲法蘭Steel pipe welding neck flange 帶頸對銲鋼制琯法蘭ring joint welding neck flange 環槽式密封麪對銲法蘭;環槽式彌縫麪臨銲法蘭;梯形槽式密封麪對銲法蘭 返回 welding neck flange