oducehigh-quality,advancedvalves,measurementandcontrolsystemandworld-renownedtransnationalenterprises,dozensofcountriesaroundtheworldhavesubsidiariesandbranches,productsinvolved:petroleum,chemical,electricityuse,metallurgical,pharmaceutical,food,watertreatment,municipalwatersupplyanddrainage,gas,paper,electronicindustry,building,mechanicalequipmentandotherfields.
（进口缓闭止回阀系列）
进口缓闭止回阀由主阀、单向阀、针阀、球阀、微形过滤器和压力表组成水力控制接管系统。利用水力自动操作，可使主阀得