ckh641h/ckh741h抽气止回阀

ckh741y/ckh743y液压抽汽止回阀

H661h/y/h641h/h643y/气动抽汽止回阀

h664hh664h汽轮机快关抽汽止回阀

ckh741h/ckh741y快速关闭抽汽止回阀

ckh741h/ckh743y液动抽汽止回阀

d373wd373金属硬密封对夹蝶阀

d373h-10c金属硬密封三偏心蝶阀

d373w金属硬密封对夹式不锈钢蝶阀

d373hD373h三偏心多层次金属硬密封对夹蝶阀

d373h蜗轮传动硬密封蝶阀

d343h/d343x零泄漏蝶阀