GB/T 12459  同心异径管 DN 350×300-8RC4Fh-16okeamB10rfA)-

DN 350×300-I-8 RC4Fh-16okeamB10rfA)-

SE 150(B)-16 RF-25r HmRFJ5sÆ4/u0

A WN 36"-150 RF B=SCH10

WN 100(B)-16 RFd=60 nrF

WN50-40m/pn5F21A23rfFL352h(b)-16rH80S3RFchf RFg=RF005 RF80-

BL80-40 RF S=20-2

WN 15(B)-40 FF S=10

WN500-900 RJ Sch60

WN 150