NB/T 47021  法兰 RF 650-1.6RFRF0-M S=4 H05h8047

47201 rf650-1.60RFRF0-M S=4 H05h8047

1 fm 500-1.0100-1.00

wn40(b)-16 rf s=3.550sch4.f scm6880g(22RF5SDL0w

SO 150-150 RF6/4L= B=2

WN50(B)-16 RF S=4pampamFM

SW20-900RF0=32RF NS/

pl20-16tS=0F

2 G 1500-1.020δ1=6html SCH10S0-150

2 RF 350-2.5h70553400Sc