save energy
节能
节
节约能源
节省能耗
节能降耗
节能降耗环保
动力节约
热能回收
save energy and development
save energy consumption
save energy of plastic windows
to save energy and to reduce discharge
reduce energy consumption
Reduce energy consumption and effluent discharge
reduce energy consumption and pollution
Budget of kinetic energy and total potential energy
dissipation of energy and transformation of energy
ratio of hysteretic energy to input energy