NB/T 47021  法兰 C-RF 1300-0.6 δs=5

1 CRF 1300-0.6 δs=5

WN80-160rfB=2920=10=@4

wn100-900rf sch14010RF0

PL100B)-25 RF b=3-10RF d=200 f1=3 L=18F Sch4..5 RJj@5c2@fF f1=3 b=4.5 AA=110Sc00B rf@40@S5 RJrvl

SO 25-300 RFB)-25RFRF40��@6R514ampampamM sch80scF0

DN100-PN100 WN F Ⅱ S=7

HG/T2