Non-powered Turbine Ventilator
参考例句：
速度快的飞行器必须让速度慢的先行；有动力的飞行器必须让无动力的先行.
It is a must for the faster paraglider letting the lower go first and the engined aircraft letting the non-powered go first.
（中文） 天长市通冠无动力风机有限公司,是集研发、生产、销售,并拥有自营进出口权的专业生产无动力风机的厂家.
（英文） Tianchang TG Non-powered Turbine Ventilation Co.,Ltd is the major manufacturer which contains the designs,making and selling processions of the turbine roof ventilators.
