NB/T 47021  法兰 RF 2000-0.25 δs=15 R

1 RF 2000-0.25 δs=15 R

DN 250-3 TSch40sh3B==0R14.2F=1A=16

2 B5-1Sch40n=17-3R-10P25R0-300 RF B=4(B)hgca0Lf/40-F=2FRS

BL25-25Mп▒Б┬≥Б∙≈п╫я▒п╫Б∙°п�

WN 8"-900 RJ Sch120

b WN1200-150 RF=1040f5RFh40sh/

PL 150(B)-16 RFRF b=