– Gene Roddenberry, Television Series Producer
![There are several types of ventilator](https://cn.insci.cn/uploads/2021/05/product201810183104314_1621949904.jpg)
There are several types of ventilator
Ventilators, which should also be classified according to different ways, such as noninvasive ventilators, invasive vent
Sentence
2021-05-25