HG/T 20592  法兰盖 BL 350(B)-2.5 RF)-000-1./�в�500RJ RM0-4

bl350(b)-2.5rf)-000-1./�в�500RJ RM0-4

WN65(B)-40 RF S==-63M1651FMRc3/uB570

WN 16"-150 RF Sch80ampampam

20592 WN20-16RF&wd=&eqi

47022c-fm1000-1.6u00ef/J Sch80

023 FM600-1.6Fh80A=46 b–җ4&ampamparf0R=26F200-h40S@40@40H4l rf��&0@407.