Warning: file_put_contents(/www/wwwroot/zidian/biehu.cn/cache/4228825f07ef804328e172d937615985.txt): failed to open stream: No space left on device in /www/wwwroot/zidian/biehu.cn/index.php on line 58 rotary ultrasonic drilling例句_rotary ultrasonic drilling英汉例句_rotary ultrasonic drilling双解例句_甲百汇小鸡词典
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。