HXF-C-1型单呼阀HXF-C-2型阻火单呼阀规格DNDNDNDNDNDNH250400400470550620H1320470470540620700L290420420535700835HXF-C-M1型密闭单呼阀HXF-C-M2型密闭阻火单呼阀规格DN50DN80DN100DN150DN200DN250DN300H250400400470550620700H1320470470540625700780H2110160160200250290320H3180270270270320370400L1300420420520650760880L2165250250320400480550HXF-J-YM1型异径密闭单呼阀HXF-C-YM2型异径密闭阻火单呼阀产品进出口公称直径及法兰标准可按用户要求设计生产)