NB/T 47021  法兰 RF 1600-0.25b=3 a

47021 rf 1600-0.25/b=3 a

47021 fm1000-0.6�RF S/0B

WN 100(B)-16 M S=3�ذ 

wn80-600rj ho5c/RF S=8 K=7H10SFF01B-8

WN 400(B)-25 RF S=8otHG2061

WN 1-1/2-300 LM Sch40S

SO 25(B)-16 RF�آ¸ع

PL80-16RF0 R=010RF/Jc

SO40-16 FML200-16RFo200-1

BL40-16G0