Illegal. Copying other people's products, if the other person's product is a registered trademark or patented product, is suspected of trademark counterfeiting or trademark infringement. According to the provisions of China's criminal law, trademark counterfeiting is a crime if the circumstances are serious. The actuator is an essential and important part of the automatic control system. Its function is to accept the control signal from the controller and change the size of the controlled medium, thereby maintaining the controlled variable at the required value or within a certain range.