HG/T 20592  法兰 PL 40(B)-16 FF b=4

PL 40(B)-16 FF b=4

PL 100-16 RF

PL32(a)-6 RF

NB/T47023 FM1800-1.0

WN 150(B)-16 RF S=4

WN 100(B)-63 RF S=10

wn 400-300 rf s=12

2 RF 2000-0.6

WN 8"-150 RF Sch40S

PL80-16FF/H30S AN/�RFFR��F6B)5RFS=7.1R5�-1.6/45-p0Srf09 W5F0 RF Sch80S2=294 B=38;