NB/T 47021  法兰 RF 700-0.25

47021 RF 700-0.25

4 B416m0(B)-105

pl50(b)-16 ff0

bl100-150rf1 sch434ch160400

pl250(b)-16t/RFfRF150RF=3.-5

wn 50-150 ff)

SO 25(B)-16 RFS50/546C

SO 65(B)-16 RF0 RF

SO 80-300 T)

WN20-150 RF B41.1F)-16RF��R/�2903c�f.S=20 H116 rf7f c0(h4/4/0b=5Sch40SR