HG/T 20592  法兰盖 BL 250(B)-10 RF b=3 k=4S

bl250(b)-10rf b=3 k=4S

WN 50(B)-40 FM S=6Sch80S-1./170-for

PL100(B)-40 RF00 RF Sch40h80S)-105frf

WN32-40FM5RFF S=38-16 RFF)-16 R

47023 FM 1600-2.5/1.S=8h80=1

WN32-900M Sch40005m RE0A2 bÃ0-1- rh60M)-0592-2)

PL20(B)-25 FF/0N0-1.0=4 S50 RFSCH40b)-

WN10