The increase of the cavity volume makes partial materials realize the air impact, the unbroken parts of which enter into the grinding zone and become fine powder after many times of impact.

容积腔增大，使部分物料实现了空中打击，其未破碎部分经过多次打击后进入研磨区形成细粉。

youdao

Work by a pair of cavity mesh with each other in motor driver of rotor, next at high speed, and between the volume is constantly changing, so as to constantly pressure increase pressure condensed.

工作腔由一对相互啮合的转子组成，在电机驱动下高速运转，齿间容积不断地变化，从而不断地压缩并升高压力。

youdao

They are the cavity radiometer and the water flow power meter for laser power measurement, the cone calorimeter and the volume-absorbing calorimeter for laser energy measurement.

有测量激光功率的空腔型辐射计和流水式功率计、测量激光能量的锥型能量计和体吸收型能量计。

youdao