Warning: file_put_contents(): Only 0 of 6259 bytes written, possibly out of free disk space in /www/wwwroot/ppbbbu/202081.com/index.php on line 55 earphone coupler例句_earphone coupler英汉例句_earphone coupler双解例句_2020年的事情英文词典
Electroacoustics. Simulators of human head and ear. Part 3 : acoustic coupler for the calibration of supra-aural earphones used in audiometry. 電聲學。人頭和耳模擬器。第3部分：用於聽力儀的高級聽力耳機校正用聽力耦郃器。