NB/T 47022  法兰 FF 800-0.6/20δ1=1

2 FF 800-0.620δ1=1

so 150-16 RF210fms11.6da s6CH16015h160

PL500-16RF B5B=10 RF sch40)5

WN 100-150 RF Sch40S�2��020��2/data8e/8 /u00)-

47021 rf450-0.6 ÃÅ

SO 2"-300 RF00a3/u0.00

SW20(B)-16 RFf sch

PL250-25RFF Sch40F Sch40Sย0Sc Sc