Auto-detecting Device of Digital Gauge Using Ultrasonic Motor
hua liang~ 1; 2 ; bao zhi-hua~3; zhang jian-sheng~4; wang shi-sen~2(1.zhejiang univ. of technology; hangzhou 310032; china; 2.nantong univ.; nantong 226007; china; 3.nantong univ.; nantong 226007; china; 4.changzhou institute of technology; changzhou 213002; china)
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