HG/T 20592  法兰 SO 400(B)-10 RF RF.htmlSh4

SO 400(B)-10RF RF.htmlSh4

PL 300(B)-10 RF

so25-600RF

pl65b)-6rf d=110

so100-150 rf sch40

WN 20(B)-25 RF

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SO 8"-150 FF

so100-300ff

so15-16mmpampamp;amp;