Conservation law of mass质量守恒定律
conservation equation of mass质量守恒方程
conservation of mass theorem质量守恒定理
average conservation of mass质量守恒法
conservation of mass charge质荷守恒
conservation of mean mass平均质量守恒法
Conservation of Mass and Energy质能守恒
conservation of a mass center质心守恒
model of conservation of mass物质平衡模型
N(名词) the principle that the total mass of any isolated system is constant and is independent of any chemical and physical changes taking place within the system 质量守恒定律