GB/T 12459  同心异径管 DN 500×300-Sch60RC

DN 500×300-Sch60 RC

DN900-PN10 WN RF i S=10

BL 400-300 RF C=8

WN50B-25FMS=R4M sR80s1F8FFF1223FSCR

pl80-16rf G7F S=66RFRF C=45RF

BL 300-300 RF D=895

WN 4"-300 RF S=12.7

支座 B55524RFS=10RF b=1450-16RF S=30

LWN 50-150 RFpamp

BL300-300 RFr