NB/T 47021  法兰 RF 1000-0.6 δ=22rfrf

47021 RF1000-0.6 δ=22rfrf

SO 100-150 RF038FRJ

SO 4"-150 FF

SO 65-25 RF=s=c3

BI 1200

DN 100-Sch80S 90ES

pl150-6rfSCH80M SCH3/1=12.6

WN 125-600 M RF-4480Sch40S 90EL5

3 FM450-2.50)0-10-150RF2R-1.022061/ RJ1R

SO 150(B)-16 RF5 k40s65RF-1G 509 R4 b