Apparatus for the remote control of industrial operations; apparatus for the remote control of signals; apparatus for use in remote control; electric installations for the remote control of industrial operations; electric remote control apparatus; electrical remote control apparatus; electrically operated remote control mechanisms for closing doors; electrically operated remote control mechanisms for opening doors; electronic apparatus for remote control; installations for the remote control of industrial operations; radio remote control apparatus; remote control apparatus; remote control devices (electric); remote control devices (electronic); remote control devices for industrial operations (electric or electronic); remote control operating apparatus (electric); electric or electronic display instruments; electric or electronic display screens; electronic display apparatus; electronic display boards; electronic display panels; liquid crystal electronic display modules; two-way wireless communication systems; wireless instruments; wireless transmission apparatus for remote control; wireless transmitters; wireless receiving apparatus