unchangeableness

Scraper conveyer motor uses the space vector pulse width modulation ( SVPWM) speed regulating system. This system is not only to get well effect, but to improve utilization of direct voltage in the event that device unchangeableness.

工作部刮板电机采用电压空间矢量脉宽（SVPWM）调速系统，不仅可以得到良好的调速效果，提高有机肥生产质量，还可以在不新增调速设备需求的情况下，提高了直流电压的利用率。

In France civil law, they are between the contractual character and its having the unchangeableness of judgment and correspondingly having the direct enforcement powers.

在法国民法上，则表现为和解的契约性质与其具有终审判决之既判力以及与此相应的直接强制执行力之间的矛盾。

This paper also discusses the principle of the electromagnetic power unchangeableness to some extent.

文章还对坐标变换过程中的电磁功率不变性原则进行了讨论。