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.
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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