Warning: file_put_contents(): Only 0 of 5302 bytes written, possibly out of free disk space in /www/wwwroot/ppbbu/laei.cn/index.php on line 58 telescoping tube是什么意思，telescoping tube的翻译，telescoping tube音标、读音、用法和例句_按摩法牛津词典
Instrument makers of the time also invented a trumpet with a sliding, telescoping tube extension. NPR: Young Tuba Player Gets Nod from Phila. Orchestra