HG/T 20592  法兰 WN 1600-16 RF S=34

WN 1600(A)-16 RF S=34

2 FF 1000-4.0 δ1=10

LWN 500-300 M

WN32B-63FMS=3 d=76

WN80-16RF S0FM S40FRF20RF0.61

LWN 450-300 M

wn 125(B)-40 RFH@f0 RF40SFf hg50F206151m�rfFSch4RFmpam

WN 25(B)-10 RF S=3.53

PL1125-10 rf

LWN 400-300 M0-150 RFotf00 RJ RFRFï؟