BS 4504 BLANK FLANGE, BLIIND FLANGE RASHIN FUSKAR FUSKAR PN6, PN10, PN16, PN25, PN40 British Standard BS 4504: Sashe na 3.1: 1989 - Flanges madauwari don bututu, bawuloli da kayan aiki (PN. Ƙaddamarwa), Ƙirar ƘarfeWannan yana rufe flanges a cikin matsakaicin matsa lamba PN 2.5 zuwa PN 40 da n ...
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