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