1,CJY3/6, 7, 9GB overhead mining locomotive 2,narrow gauge locomotive 3,double-motor traction version ModelCJY3/6,7,9GAdhesive Weight3 ... ModeMechanicalMechanical or Air The meaning of model:Example:CJY14/6GYBC—Locomotive T—Special explosion proof Y—Single cab L—Double cabsZ ... conversion speed regulation 14—Gross weight 6--Gauge 3t overhead electric locomotive