动力、能源类 ：电源、发动机、电机、电池、螺旋桨、减速箱、电子燃油控制等；

Power and energy : power, engine, motor, battery, propeller, reducer, electronic fuel control, etc. ;

youdao

动力、能源类 ：电源、发动机、电机、电池、螺旋桨、减速箱、电子燃油控制等；

Power and energy : power, engine, motor, battery, propeller, reducer, electronic fuel control, etc. ;

youdao