HG/T 20592  法兰盖 BL 50-16 MN25-300 RF H=650 B=67pampamF S

bl50-16 mN25-300 RF H=650 B=67pampamF S

WN350-300RF sch40=N400RFRD=RF16 RF S=5.50SRF4

WN 500(B)-10 RF CRST)RF B=Sch120´0=104a=27´=430A

WN80(B)-16 FF 1=CH4030)-6s=60/60-1205r88)-F

WN25(B)-160FM600-16ric==65FM02/data/src/haibo.jpg

PL200(B)-16FM0S=1