HG/T 20592  法兰盖 BL 450(B)-16 RF3070 RF S=(B)-166c

bl450(B)-16rf3070 RF S=(B)-166c

BI 700ะจยทะ’ยฐะจั

WN 50-300 RFRFpa00-

47065.2 A2-600-2

WN10-160RJ0-0.64.5 RJ0FF250r60=4R

WN 80-150 RF Sch10S05 ScB

BL250-10RFذ°â„–ز–ذ°ر‘�F S=3.5 H=3000RF s=8E0r066 r1-20=/rโ€”