BS 4504 BLNK FLANGE, BLIIND FLANGE PHAHAMISA SEFAHLEHO PN6, PN10, PN16, PN25, PN40 British Standard BS 4504 : Karolo ea 3.1 : 1989 - Circular Flanges for Pipes, Valves and Fittings (PN Specifications Designated).Sena se akaretsa li-flange tse maemong a khatello ea mabitso PN 2.5 ho ea ho PN 40 le n ...
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