NB/T 47023  法兰 FF 2800-6.4/20خ´0=186

3 FF 2800-6.420خ´0=186

JWN 80×125(B)-16 RF

2 RF 500-1.020δ1=16

BL80-300RF

PL125-16Rf RFsch400-150 RF H=401

1 RF 650-1.0 δs=6

SH3406WN50-10RJ FF Sch0S02ch368/0â€0rfmp

WN 25(B)-16 RF S=3.5

WN50-900 RJ SCH80F/u00e8/u009d/u00b6/u00e9/u0098

WN15(B