GB/T3036-94 A.AS type Marine Center-pivoted Butterfly Valve
GB/T3036-94 B.BS Type Marine Center-pivoted Butterfly Valve
GB/T3036-94 C.CS Type Marine Center-pivoted Butterfly Valve
GB/T3036-94 D/DS Type Marine Center-pivoted Butterfly Valve
GB/T3036-94 E.ES Type Marine Center-pivoted Butterfly Valve
GB/T3037-1994 A.AS Type Double Eccentric Butterfly Valve
GB/T3037-1994 B.BS Type Double Eccentric Butterfly Valve
GB/T3037-1994 C.CS Type Double Eccentric Butterfly Valve
GB/T3037-1994 D.DS Type Double Eccentric Butterfly Valve
GB/T3037-1994 FA.FAS Double Eccentric Butterfly Valve
GB/T3037-1994 FB.FBS Marine Double Eccentric Butterfly Valve
