NB/T 47022  法兰 RF 500-0.6/20�

2 RF 500-0.620�

SO 80(B)-16 RF

DN15-PN16 WN RF Ⅱ S=3.5

BL4"-150 RF

PL32-6ff�2-RFFmF7c WN RFВ Гў

3 B4

47023 RF1500-0.6 æÅвҖҢШ°δs=Rcf hg/forum.htmlaSRFSch404/0-16r RF9

WN 65(B)-16 RF S=4

WN50-25RFh=66

SO 22"-150 FF=