AE-TDS/20 - Brushes for slip-rings
AE-TDS/19 - Brush bedding
AE-TDS/18 - Degreasing of commutators and rings
AE-TDS/17 - Humidity of air
AE-TDS/16 - Standardization of the dimensions of brushes
AE-TDS/14 - Brush sparking
AE-TDS/13 - Aspects of commutator skins
PTT-TDS/11 - Pressure on carbon brushes
