9 [ control panels and manually and pyrometrically and galnometrically controlled electric switches rheostats, and heating-current controllers for regulating or controlling the temperature or operating conditions of electric furnaces, electric ovens, and electric heat-treating furnaces; ] electric flow meters and pressure or rate of flow controllers, and telemeters; mechanical flow meters for recording and totalizing with or without indicating means; pneumatically operated regulator to vary the passage of a medium through a conduit in response to a controlled pressure applied thereto; [ voltage and current regulators and compensators, ballasts and reactors; rotary type integrating flow meters for steam, air and gas, and accessories therefor, namely, liquid gauge glass, transmitters, remote totalizer, flow rate indicator, flow rate recorder, flow demand indicator and flow demand recorder; ] [ measuring and scientific appliances, namely, liquid baths, temperature controllers, pyrometers, thermostats, incubators for scientific and laboratory use, namely, liquid level controllers; ] thermal relays, namely, time delay relays, voltage sensing relays, and current sensing relays; [ laboratory mixers; ] data processing and control switches and relays; [ moisture detecting devices for oil quench tanks; ] [ electric line voltage regulators; electrical and electronic equipment, namely, coils, transformers, inductors and reactors, electronic relays, telecommunication control circuits, signal generators, ] [ automatic telephone dial pulse generators, ] [ and signal regenerators and repeaters; ] [ ballasts for supplying energy to gaseous discharge lamps; ] [ static magnetic voltage regulators; ] [ two-way mobile radio equipment and parts thereof; ] [ electronic and electrical equipment, namely, telemetry systems for collecting and communicating information and data, and for transmitting control signals from one location to another, namely, data logging systems, scanning equipment, encoders, decoders, pulse code modulators, code sequence selectors, code convertors, and speed convertors; ] [ software for use by a network administrator in connection with the control, transfer, and installation of software, files and data to various clients connected to the network; telephone data transmission interface for uninterruptible power supplies; inventory software, namely, software for tracking inventory in a laboratory; laboratory equipment, namely, recorder thermometers and electronic loggers for electronically storing temperature data for subsequent reading, graphing, and analysis by software and computer; alarm systems, comprised of electronic thermometers connected to an annunciator which provides a warning signal regarding unacceptable temperature readout displays; electrical module for weighing bulk materials, primarily coal and limestone; computer systems, comprising hardware and software for simulating terrain views and displaying images; AC and DC power systems, namely, uninterruptible, fault tolerant and telecommunications, electrical power systems comprised of invertors, rectifiers, power conditioners, battery management units and uninterruptible power units for use in power blackout and line conditioning applications; computer software for controlling, managing and monitoring power operations and functions; ] DC electrical power generators; [ electronic controller for coal feeder system, ] [ electromechanical diameter control units for crystal growing furnaces; ] [ switches for electrical or optical signal connections, namely, matrix switches, computer channel switches, local area network switches, control units for switching applications among computers and input/output units; protocol analyzers; switch or patch units for patching or switching in computer networks and in telephone networks; ] [ optical fiber patch panel and management units; ] telecommunication transmission equipment and monitoring and test units; [ and monitoring and test units to implement and maintain local and long distance communication paths and parts for the foregoing; ] [ optical multiplexer for combining two or more optical signals into a composite optical signal; optical fibers and an interconnection unit for interconnecting or patching one set of optical fibers to another set of optical fibers primarily for large mainframe computer data center environments; electrical power systems comprised of invertors, rectifiers, power conditioners, battery management devices and uninterruptible power units for use in power blackout and line conditioning applications and computer software for use with the foregoing; ] [ electrical transmission lines, namely, electronic waveguides for transmission of radio frequency energy; energy transmission and distribution equipment, namely, electrical transformers, voltage surge arresters, tap changers, and package substations; ] [ multiple cable transit system, namely, a fire stop transition box positioned in fire rated barriers such as floors or decks, walls or bulk heads, and ceilings, for the passage of cables and/or conduits there through; ] fluid rate of flow meters and controllers; [ interface units, namely, printed circuit boards for use in connecting servers to the channels of mainframe computers; ] electrical connectors for use with a conduit; [ connectivity unit for connecting a server to mainframe computer; multi-cable transits, namely, a pressure-tight packing assembly utilizing a modulus system of elastomer blocks, arranged so as to fill up spaces between cables and the interior of a frame; communications test equipment, namely, a test head for testing subscriber circuits for digital loop carrier systems; ] [ optical multiplexer for combining two or more optical signals into a composite optical signal; ] [ electrical operated circulating liquid bath and stirrer apparatus for laboratory, pilot plant, and production manufacturing uses; ] [ security equipment, namely, card access units, access cards and card readers ] [ ; reagent-treating retorts for laboratory use ]