HG/T 20592  法兰 WN 500-25 MFm18mnn

WN500-25MFm18mnn

PL40-25 FF H1==3δ=fF SFSc

BII 1000 h=300 l100-6

SO 18"-150 RF/t2

PL25-100 FM1600G

DN250-PN250 WN RF Ⅱ S=10

BL15-300 FF

SO150-150 RF45 n=

WN700(B)-16RF S=≥10

WN 80(B)-16 RF S=4 S=4-25FF0-156803S=8R1536=34/B)-16F S=C=2-250RF