M51 file and OMF file

help:
From the file m51 I found the following information:
B:0026H.1 SYMBOL fgResult

but when I check it in OMF file, the symbol information is the following:
segment id: 0x00
offset : 0x0030
type index : 0x03
symbol name: fgResult

from the OMF file how could I get the detailed address of the symbol just like
B:0026H.1
Thanks for your help!