z 011- a wafer butterfly valve dn 20 – 1200, max. 16 bar
蜗杆齿轮链轮的 epdm 橡胶蝶阀 - buy epdm seat butterfly valve
带齿轮箱和手轮的法兰偏心蝶阀 - buy flange type butterfly valve
20/ 21 series rubber butterfly valve / wafer 1 – 20″, 150 psi
u type butterfly valve
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