洋洋
- Design and experimental study of active balancing actuator driven by ultrasonic motor①
ngyang(王洋洋),PAN Xin②,GAO Jinji,WU Haiqi(*Beijing Key Laboratory of Health Monitoring and Self-recovery for High-end Mechanical Equipment,Beijing University of Chemical Technology,Beijing 100029,P.R.China)(**Key Laboratory of Engin
High Technology Letters 2022年4期2022-02-11
- Ｌｅａｒｎ?。簦铩。樱鳎椋?/a>
毛洋洋One day，my brother and I went swimming.We changed the clothes and jumped into the swimming pool. But I couldnt swim, so first brother taught me how to swim. After a few minutes, I could swim. My brother swam to me and said, “Gr
讀寫算·高年級(jí) 2009年5期2009-06-15