用途與性能規(guī)范ApplicationandPerformanceCriterion1．球閥廣泛適用于食品、環(huán)保、冶金、石油化工等管路系統(tǒng)中。具有調(diào)節(jié)管路流量及截流等功能。1.Ballvalveiswidelyappliedinthepipingsystemsoffood,environmentalp