NB/T 47021  法兰 C-RF 300-1.0R.0/300��Г…B=46.1 H=280.6B1680°п╖.5 C=2

1 CRF 300-1.0R.0/300��Г…B=46.1 H=280.6B1680°п╖.5 C=2

BL 100-25 m

WN600-10RF、-150 RF S/6f cch=3 Ⅱ440RF5

LWN 50-150 RF B=52 H=326

BL 100-25 RFA 25A

BL 2"-300 RF（2552

PL 32-40 FM/f1 SS=88F16n45.3ffF

WN25-150RFc=30 bb=824 40F

PL 50