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: The replacement of elastomeric packings by metal diaphragms gives this valve superior leak integrity at the top works of the valve and stem.
用金属横膈膜代替人造橡胶密封给予了这种阀门更好的对空气的泄漏完整性。
The replacement of elastomeric seals with metal diaphragms gives this valve superior leak integrity to the atmosphere.
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