GB/T 12459  弯头 DN 500-890ESF S

DN 500-8 90ESF S

wn20-600rf.1=0 rf6

WN 16"-600 LFM Schf s6RF/0092/upamp60SchR150

WN 50-150FM Sch1S1F-20

1 FF 700-1.0 δs=14

WN100-900 RJ B0rf5RF/L25

PL 500-6 RF10F0RFRpamp

47065.4 B8f

WN100-10 RF Sch10S

2 RF 1600-0.25 R.3 SF-1.5E3F Sch42.5)-16Re