HG/T 20592  法兰 PL 1200-6 FM= n=B)-1FRF S=12.7

PL1200-6 FM= n=B)-1FRF S=12.7

WN300(B)-16 RF S=8 C=46 H96

LWN40-150 RF B=40.

pL25(B)-40RF=690440S80Rf-F20

wn80-16rfs=500c6=12=57

So25(a)-16 Fm S=40(b)-150rfm s=9

PL 200(B)-16 RFRL02h4040 SCH=3=37.5°32=20d=

WN40(B)-16FFstml h=)-16 RF D=140

PL 50(B)-