[HSP] HSP1~HSP24

[HSP8] Effect of improving fuel efficiency by reducing the weight of high-speed trains and electric vehicles

*KIM SEONGJUNE¹、KIM IJUNE²、KIM GYUMIN³ (1. Chongqing Weiming School (high school)、2. Chongqing Weiming School (high school)、3. Chongqing Weiming School (Middle school))