短語詞組短語Butt Welding Neck Flange 帶頸對焊法蘭raised face welding neck flange 凸面對焊法爛;凸面對焊法蘭Steel pipe welding neck flange 帶頸對焊鋼制管法蘭ring joint welding neck flange 環(huán)槽式密封面對焊法蘭;環(huán)槽式彌縫面臨焊法蘭;梯形槽式密封面對焊法蘭 返回 welding neck flange