STRENGTH

• 

  2009 Push not pull structure

• 

  2010 Utility model patent certificate

• 

  2011 Transmission structure

• 

  2011 Rolling structure

• 

  2011 Linear drive

• 

  2014 Improved drive

• 

  2015 Control system

• 

  2015 Screw structure

• 

  2015 Carbon brush holder

• 

  2015 Putter

• 

  2015 Shell

• 

  2015 Shaft core structure

• 

  2015 Self-locking electric push rod

• 

  2016 Mounting base

• 

  2016 Door opener