Warning: file_put_contents(): Only 0 of 7638 bytes written, possibly out of free disk space in /home/www/wwwroot/ndsq.cn/index.php on line 55 rotary ultrasonic drilling是什么意思，rotary ultrasonic drilling的翻译，rotary ultrasonic drilling音标、读音、用法和例句_开心英文字典_柠咚词
A portable and rotary type ultrasonic drilling machine is developed and designed for drilling of carbon fibre composition components. 为碳纤维复合材料构件的钻孔，研制出一种便携式旋转超声钻。