Butt welding flange, tseem hu ua siab caj dab flange, yog ib hom yeeb nkab haum, hais txog lub caj dab thiab hloov cov yeeb nkab hloov thiab cov yeeb nkab taub qab vuam flange txuas. Vuam flange tsis yooj yim rau deformation, zoo sealing, dav siv, haum rau siab los yog kub fluctuation ntawm pipelin ...
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