JZFS-J8B,JZFS-J10B,JZFS-J15B,JZFS-J20B,JZFS-J32B,JZFS-J50B,JZFS-H8B,JZFS-H10B,JZFS-H15B,JZFS-H20B,JZFS-H32B,JZFS-H50B,板式式截止阀