NB/T 47021  法兰 M 300-1.0RFvokerServlet50 rf-1.

1 m300-1.0RFvokerServlet50 rf-1.

47023 RF500-4.0/58-RF-1.00 RFRFF-)-65F8 R FF5901a15WN10.0-19 Sc

SO 600(B)-10 RFF0 rf S30408RF S=6000-=47

WN250-300RFs=8s=1890

SO65-16RF00-

WN20(B)-16 MF=45FFF6

PL25B-10RF00234fF/RF0/.0F

HB/@LWN100-150 RF5-1.XS-1-;amp;