HG/T 20592  法兰 PL 450-16 RF d=635 d=45 aa=460 b=5 f1=4/

pl450-16 rf d=635 d=45 aa=460 b=5 f1=4/

BL32-1500FMC=44 S=8=86-1

wn150-150rfsch80sS=5.6H

BL50-40RF300 rf)-

WN 100(B)-16 RF d=156 H1=10 S=RF/1

5 M 450-4.

PL32(B)-16 RF D=130 f1=3 b=3

BL15(B)-6 RFS=4c=27

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