Valve Advantages: the valve can be used in many of the same services as the wrench-operated valve.
阀门的优点：该阀门可以用于许多使用扳手型阀门的应用中。
Valve Advantages: The replacement of elastomeric packings by metal diaphragms gives this valve superior leak integrity at the top works of the valve and stem.
阀门的优点：用金属横膈膜代替人造橡胶衬垫在阀门和阀杆的顶部机件处给予了这种阀门出众的泄漏完整性。
Valve advantages: Along with the advantages of the earlier diaphragm design, the second generation valves incorporate features which provide additional benefits and flexibility.
阀门的优点：除了较早的横膈膜设计的优点以外，第二代阀门还具备了提供另外的好处和适应性的特点。
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