9 Transformers; electric, electromechanical and electronic switching, control and regulating apparatus, namely, voltage and current regulators, measuring apparatus and installations manufactured from the aforesaid apparatus, namely, conductivity meters, ampere meters, temperature and oil pressure indicators, pressure indicators, oxygen indicators, fuel quantity indicators, volt-frequency indicators, fuel-flow indicators, tachometers, and torque indicators; electric, electromechanical and electronic valve controls; rectifiers; contactless switching devices, namely, automatic switching apparatus, high-frequency switching power supplies; physical and electro technical apparatus, instruments and devices equipped with electromagnets and permanent magnets, namely, magnetic encoders, electromagnetic coils, magnetic shot bolts, magnet solenoids; control and regulating apparatus for magnets, in particular adhesive magnets, locking magnets, oscillating magnets, electromagnetic vibrators, actuation magnets and valve magnets; magnets, in particular electromagnets for direct current, alternating current and rotary current; magnets, electromagnets, electrical relays and contactors being automatically actuated switches, electrical apparatus for commutation, namely, commutators, and rectifiers; systems consisting of electromagnetic actuators; polarized magnetic systems comprising magnets, magnetic cores, solenoids, and magnetic coils; electronic circuitry; sensors for proximity, temperature, pressure, current voltage, flow, speed, torque; sensors for detecting position and security applications, distance sensors; electronic controls for electromagnetic actuators; switching equipment, namely, computer switches, differential switches, shot bolts; lasers for industrial and scientific use, not for medical purposes and parts therefore; mechatronic systems and parts therefore, consisting of high duty cycle solenoids, heavy duty solenoids, rotary solenoids, holding magnets, shot bolt locking units, solenoid valves, and miniature solenoids; fixing magnets, lifting magnets, magnets, in particular adhesive magnets, locking magnets, oscillating magnets, actuation magnets, valve magnets; pressure regulating magnets; control magnets and switching magnets; proportional magnets for hydraulics and pneumatics; direct current and alternating current lifting magnets; solenoid valves for ac/dc; valve solenoids for ac/dc; safety valve solenoids; hydraulic regulating and switching magnets; holding magnets and permanent magnets; magnets, namely, electric magnets for use as clamps, electric permanent magnets; alternating current oscillating magnets; electromagnetic and permanent magnetic reversal lifting magnets; rotary solenoids for switching and proportional applications; rotary solenoids, rotary control magnets; electromagnetic and permanent magnetic multiple position magnets; trigger magnets; audible and visual warning and safety systems and parts therefore consisting of warning bells, warning horns, warning sirens, electric warning lights, and warning flashes