Is it lost, in violation of the conservationprinciple?
是违背守恒定律而凭空消失了吗?
2
The equation of a spacecraft with solar arrays are obtained by using the conservationprinciple of momentum .
利用动量矩守恒原理导出带太阳阵航天器的动力方程,指出了系统的非完整约束性质。
3
Based on illustrating the energy conservationprinciple of burning emulsified oil, the mechanism and the advantages of ultrasonic emulsion are analyzed.