NB/T 47021  法兰 RF 1700-0.6/20δs=10-20

1 RF 1700-0.620δs=10-20

wn2000-16 rf s=8=/40s

47023 -fm 1500-2.5-4.0pampamch

WN 80(B)-63 RF S=11000-

SO 6"-150 RFD=339.8 f1=2

PL80-10FF AA=126 C=-�F �

pl15-25 rf=1650J4@LWFb)-25fgch46

47023 fm 800-1.0 δ0=12

WN600-16RJ005804RF Ⅱ550 RFF

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