タイトルまたは説明

1.High starting point: the two patents, an invention.                          
2.Rotation Speed:******0RPM.           
3.Strong vacuum system can protect the user's health effectively.                         4.High brightness LED inside facilitates greatly the work of the operator without glare.         
5.Speed cruise can reduce foot fatigue greatly.                          
6.LED speed display window shows an intuitive and easy speed selection.                
7.Microcomputer can protect safety of both the operator and the machine.   8.Forward reverse selection switching delay of 2 seconds protects the motor effectively.                   
9.Hand, foot variable speed control systems are chosen. Both hand and foot can raise working efficiency.
*0.Quick change for grinding system without using auxiliary tool can improve work efficiency greatly.               
*1.Brush motor or brushless motor can be selected at random.                      *2.Working memory of the motor time accumulation and digital display make machine maintenance evidence-based. 
*3.Easy to clean or disassemble the dust bag.                          
*4.Coaxality：0.*2MM.