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Ñ Ï l ÌK - Flowserve · 2020. 1. 2. · 泄露等级 ANSI/FCI 70-2-2006:四级(金属阀座)和六级(软阀座) 控制范围 可达 160:1 内件 100 %, 40 %(NPS 尺寸
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