NB/T 47021  法兰 FM 450-0.25 δs=12

1 FM 450-0.25 δs=12

WN80(b)-40RF

PL200(B)-10 RF b=3a/u00

WN250(B)-40 RF S=4.5

PJ/RJ 300(B)-10 RF0 RF Schff s RF Sch40S

pl600(b)-10rf d=775 c

DN 80-Ⅱ-5 90ESampqu SCH40l1H@RHR01.0F

SO80-150RFH000-s=18/

1 RF 650-0.610RF 3F Sch40N80-600490F

SO32-150R