ELECTRIC MEASURING DEVICES, NAMELY, PROTRACTORS AND INCLINOMETERS; ELECTRIC REGULATING CIRCUITS AND ELECTRIC CONTROL DEVICES, IN PARTICULAR FOR REGULATING AND CONTROLLING INCLINATION, POSITION AND ROTATIONAL SPEED; ELECTRIC APPARATUS AND INSTRUMENTS FOR WEIGHING; ELECTRONIC APPARATUS AND INSTRUMENTS FOR DOSING; ELECTRIC AND ELECTRONIC SYSTEMS COMPRISING ELECTRIC MEASURING DEVICES, NAMELY, PROTRACTORS AND INCLINOMETERS