NB/T 47021  法兰 RF 900-1.6/1-4.0/1

WN 25-1500 RF B=15.22

47021 rf900-1.61-4.0/1

HG/T20592 PL125-25RF.f-1.6 RFrf

wn500b-40rfs=2.600.04

B WN1000-300 RF D=1

WN 20-1500 RF)nRF0SCH1.696-0cF-16.

SO32-40 m5S=30chÃ.40SFF•

5 CRF 2800-1.6 δ0=1

BWN1300-300RF B=10S0-1

SO50(A)-40 T1.070h46 RF