NB/T 47023  法兰 RF 600-1.0 –∞¬†–≤¬Э–∞¬Т–Ґ–Й–∞¬†–≤�

47023 rf600-1.0 –∞¬†–≤¬Э–∞¬Т–Ґ–Й–∞¬†–≤�

bl15b-10 rfF1-��6Ff0 h20-d)- S=bsp‡é¢˜10

WN50-600RJ B=50avlesch805-1b

WN250(B)-25RF C=42 H98=ch402009 P6 RF40sRF6 r.5H

2 FF 550-1.620δ1=81=600818R/ K=13nb/data

SO