9 Flow meters and fluid flow meters for use with gas, water and oil; fluidic oscillators; electromagnetic static flow meters; electricity meters; and parts for the above-named meters; pressure regulators for use with gas meters and flow meters; prepayment apparatus, namely, token-operated, coin-operated, card-operated, meters for electricity, gas, and fluid fuel flow and supply; apparatus for the memorization of data related to such flow meters, namely, event recorders and computers; apparatus, namely, radio transmitters, cable transmitters for the electronic transmission of data; systems consisting of computers and computer software for use in database management, radio transmitters, cable transmitters, computer network hubs, and computer printers for remotely reading and/or remotely transmitting and/or remotely retrieving and reviewing data related to such meters