HG/T 20592  法兰盖 BL 20-16 RFr17S=920 RF S=140900-150

BI 8501=7300-4.039 BL20-16RFr17S=920 RF S=140900-150

WN 100-150 RF S=t Ⅱ�©å¾�=18 S=4 A80-10RFF S30

WN100-300 RF B=1RF S=3c60028 N=45f0t119 H=-1.6/F

bl50-16RF d=100

PL 250(B)-6 RFС6 fm RF S=t Ⅱ�©å¾�=18 S=4 A80-10

SO80(A)-10 RFh40 RF