supply of brush carbon ta-17 (dlw pt. no. 18420060) drawing no. emd pt. no. 40034666 alt. a3,rdso spec. no. mp. 0.2400.60 (rev-05), nov-2018, refer rdso letter no.sd.dfm. a2.2 dtd. 06.07.2018for carbon blocks and brush grades list for traction application in diesel locomotives.