Warning: file_put_contents(): Only 0 of 5279 bytes written, possibly out of free disk space in /www/wwwroot/ppbbu/73904.com/index.php on line 55 ultrasonic drilling machine例句_ultrasonic drilling machine英汉例句_ultrasonic drilling machine双解例句_骑士汉英词典
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。