I-BS 4504 WELDING NECK FLANGE PN6, PN10, PN16, PN25, PN40 British Standard BS 4504 : Icandelo 3.1 : 1989 - IiFlange zeSetyhula zeMibhobho, iiVave kunye neFittings (i-PN ekhethiweyo), Ukucaciswa kweeFlange zensimbi.Oku kugubungela iiflange kuluhlu loxinzelelo lwegama PN 2.5 ukuya kwi-PN 40 kunye nobukhulu begama ukuya kuthi ga kuD...
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