HG/T 20592  法兰 PL 300-6 FF21htb=hF S=33.32h40S6oS=/58F/-30

PL300-6 FF21htb=hF S=33.32h40S6oS=/58F/-30

WN500(B)-10 RF Sch40RF0F-6w.hgc=10610 RHGwn20

WN50(B)-16 RF sch11=1

5 FF 900-1.020δ0=18

DN150-PN10 PL FF Ⅱrf6H1=12)-M-10 rf

BI 600510=10ampa/T206 RF D0-

WN50(B)-300 m3.500r150RF S=3.5 90E

BI1000 RF C=RF2