【判断题】转速开环变压变频调速系统,由于系统本身没有自动限制起制动电流的作用,因此,频率设定必须通过给定积分算法产生平缓的升速或降速信号。
【简答题】Who is calling to the entertainment industry to ensure their responsibility? They are __________ and the Smoke Free Films project at the University of California in San Francisco.
【简答题】Who is calling, please ?