NB/T 47022  法兰 FM 900-0.25/20Оҙ1=6

2 FM 900-0.2520Оҙ1=6

SO 80-300 RF

PL25(B)-40 m+b…00RFmpampampampampa

WN410-16 RF5EL50 ���

SO 65-300 RF

PL65-40RFS=3.5-150RFR20

SO 40-25 RF105 s=

PL100(B)-16 FF BB=104F50 RF 900-00150r R

BL 250-600 RF600-1.15568*18

WN1200-150 RF Sch40Ff