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??? 3?? ??? ?? ?? ?? ?? flange three eccentric multi-level hard seal butterfly valve D343W-10/16/25/40R

??? 3?? ??? ?? ?? ?? ?? flange three eccentric multi-level hard seal butterfly valve D343W-10/16/25/40P

? ??? ??? ?? ?? ?? wafer three eccentric multi-level hard seal butterfly valve D363

??? ??? ??? ?? ?? ?? butt welded three eccentric multi-level hard seal butterfly valve D363

??? ?? ?? ?? ?? flange SG iron butterfly valve D41X-10Q

? ? ??? ?? ?? ?? ?? worm flange SG iron butterfly valve D341X-10Q

D71 ?? ??? ?? ??

D371 ? ??? ?? ??