德国4WREE 6 E1-16-2X/G24K31/A1V

先导式安全阀采用系统介质作为操作介质是zui安全的。不过，某些规范也允许采用外部操作介质，只要这些操作介质系由几个独立的能源供给，或者只要先导式安全阀的载荷是有限的
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一八七七一零二二八二九
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