NB/T 47022  法兰 C-T 650-0.6/20δ1=18

2 CT 650-0.620δ1=18

SOP FF 10K 650A

BL 600(B)-10 RF

DN 50×25-3 RC

WN 600-300 RF

BI 500

PL 300(B)-10 RF

WN150-150 RF SCH80S

wn20-150rf sch40

WN 80(B)-63 RF S=4-6RFRJ Sch16006 RF0F S=3sh10= rfRF/0sc@S/2@ RF5 �N@ch4Sc1.8 f1= R1caRF ScC0sF RF.m0F.508