HG/T 20592  法兰 PL 65-6 RF A AA=F5s=3 rf s=5.51.

PL65-6RF A AA=F5s=3 rf s=5.51.

BL 150-900 RJ1=3 MX=NRF f1=/

DN20/PN16/02&32A-16t RFfJ

so25(b)-16RF b=0h=11680Sch160

DN20-PN2.5 WN RF ISs=6+ch850F-Rmpampampa1RF0��J

WN40-150 RF S=5 r.b=3RF3

DN50-PN100 WN T I S=

2 FM 1200-6.4 δ1=14

SO20-16G 600