[HSP] HSP1~HSP24

[HSP9] Economic effect of improving fuel efficiency in electric vehicles by using lightweight alloy

*KIM IJUNE¹、KIM SEONGJUNE²、KIM JAEMIN³ (1. Chongqing Weiming School (high school)、2. Chongqing Weiming School (high school)、3. Maple Leaf International School-Chongqing)