intangible wear and tear invisible depreciation invisible waste moral depreciation moral wear nonphysical wear
Example Sentences:
1.
For the time being we are concerned only with the question of how much we have to pay for obsolescence cost 这里我们仅关心我们要有多少无形损耗的问题。
2.
As we all know , the back - pressure valve ( also called evaporating pressure regulator ) is often used to regulate the evaporating temperature of every high - temperature refrigeratory in the system containing many different temperatures but single engine of the ship . but it is neglected that the energy of the system is lost and the efficiency of the system becomes low 众所周知船舶单机多库(简称为高、低温冷库)系统中，常用背压阀(蒸发压力调节阀)来调节各高温库的蒸发温度，但忽略了系统无形损耗的能量，效率也有所下降。
