iezoelectric;Sensitivity;Sound fields;Sound pressure;Sound transducer;Specification (approval);Ultrasonic devices;Ultrasonic frequencies;Ultrasonic testing;Ultrasonics【摘要】: 【中国标准分类号】: A59【国际标准分类号】: 11_040_60;17_140_50【页数】: 86P.;A4【正文语种】: 英语 | 欢迎光临 世界资料网论坛 (http://bbs.infoeach.com/) | Powered by Discuz! X2.5 |