train set
noun
1
- a set of railway wagons or carriages, often with a locomotive, coupled together for a particular service（由货车厢, 或乘客车厢、常常还包括机车在内组成的）列车组。
2
- Brit. a set of trains, tracks, and other things making up a child's model railway〈英〉（供孩子们玩的）模拟火车。