HG/T 20592  法兰盖 BL 350-16 FF rf8F20gF S=10-4.0

bl350-16ff rf8F20gF S=10-4.0

bl 300-150 RF50 RJ2-22

WN200(B)-25FF2M Sc/46

bl450A-10RF0g¢)-10rfFrf/u00c3=55 RFf1=3.0/34

NB/T47023 fm350-1.6 δ0=8

47023ff1000-1.6=5h416RF00-0.2-1.60-1

WN200-300RF Sch405.5f 2Fc40020C52-Smp

SO 80A-16 RF b=4

LWN300-150R