TY - Front. Mech. Eng. A1 - JIN Jiamei, ZHAO Chunsheng T1 - Bi-modes alternation stepping ultrasonic motors Y1 - 2008-03-05 JF - Frontiers of Mechanical Engineering JO - Front. Mech. Eng. SP - 101 EP - 105 VL - 3 IS - 1 UR - https://journal.hep.com.cn/fme N1 - 10.1007/s11465-008-0018-1 ER -