What does 03 car 01c mean?

[OAurora]

03 car 01c means that 03 is the carriage number, 01 is the row number, and A is the seat number, which is seat A in row 01 of carriage 03. The following is an introduction to engine-related content: 1. Energy conversion: An engine is a machine that can convert other forms of energy into mechanical energy, including internal combustion engines (reciprocating piston engines), external combustion engines (Stirling engines, steam engines, etc.), jet engines, electric motors, etc. For example, an internal combustion engine usually converts chemical energy into mechanical energy. 2. Device: The engine can refer to both the power generation device and the entire machine including the power device (such as gasoline engines, aircraft engines). The engine was first born in the UK, so the concept of the engine also originates from English, and its original meaning refers to that kind of "mechanical device that generates power".