HG/T 20592  法兰盖 BL 25-16 RF0=4 Sh40-S2.5 S

BL25-16RF0=4 Sh40-S2.5 S

WN 40(B)-25 RF S=5

DN 750×750×300-Sch30 TR0

PL250-6RFi2L45

so15(b)-25fm

PJ/SE 40(B)-40 RF S=5

3 FM800-10S=8 S=5.56 N=49.3 dF S=4FS S=12.7n= c=15

WN500-300 RF Sch80S

47023 fm900-4

DN500/PN25/11B S=12.700-1.025.6/FRF2RFm-10RF