Electric soldering and desoldering apparatus; rework apparatus, namely, apparatus for reworking specialized arrays of electronic components, by heating, removal, placement, and resoldering of electronic components attached to a printed circuit board; electric powered soldering and desoldering fume extraction apparatus; electric power supplies for electric powered soldering and desoldering apparatus; electric powered soldering and desoldering irons and replaceable heater cartridges for use with electric powered soldering and desoldering apparatus; automated and manual industrial fluid dispensers and structural parts therefor, namely, dispensing syringes, receiver heads, dispensing tips, dispenser cartridges, plungers, nozzles, needle adapters, end caps, seals, two components cartridge packaging and mixing kits, comprised of a cartridge, a rod with piston, a mix head, a cap and a tapped barrier, mix heads and rods, cartridge dispensing guns, plunger seals, flow restrictors, retaining nuts, dispensing mixers, fluid dispensing valves, dispensing pens, valves, dispensing controllers, pressure dispensers, fluid line assemblies, adapters, for use in electronic assembly and repair, and tool fabrication, assembly, and encapsulation

Air purification units comprised of air filtering units, ventilating exhaust fans, exhaust arms and exhaust nozzles, devices for measuring and controlling airflow, devices for measuring air quality, sold as a unit; down draft stations, namely, workstations for exhaust of fumes and gases; ventilation hoods for fume exhaust of non-laboratory work areas; electric cabinets for controlling fume exhaust and replacement air filters for use therewith