Warning: file_put_contents(): Only 0 of 7218 bytes written, possibly out of free disk space in /home/www/wwwroot/ndsq.cn/index.php on line 55 fret saw例句_fret saw英汉例句_fret saw双解例句_开心英文字典_柠咚词
The ultrasonic vibration cutting processing of electroplated diamond wire saw for hard and brittle materials was researched. 利用自制的实验设备研究电镀金刚石线锯的超声纵振动切割加工脆性材料。