Laboratory apparatus and instruments for hydraulics model test for testing liquids; water temperature gauges; surface roughness testing machines and instruments; flatness testing machines and instruments for testing surface of metals; automatic temperature control machines and instruments being temperature controllers for water temperature; automatic combustion control machines and instruments; water level indicators; water flowmeters; water quality monitors being scientific instruments for measuring water quality; sludge densitometer, not for medical use; dissolved oxygen meters being scientific instruments for measuring oxygen; water current meters being scientific instruments for ocean and river observation; vibration meters; gravimeters; pressure measuring apparatus; weighing apparatus and instruments; actinometers; underwater cameras; water samplers for measuring purposes being scientific instruments for measuring water quality; sensors being measurement apparatus for measuring water temperature, water flow and water quality, other than for medical use; water temperature gauges; salinometers; quantameters being scientific instruments for measuring sunlight; automatic water quality measuring apparatus being scientific instruments for measuring water quality; ultrasonic thickness gauges; hardness gauges being metal hardness testing machines; electrical power distribution and control units; rotary converters; electrical cells and batteries; electric and magnetic measuring machines and instruments, namely, electromagnetic current meter and electromagnetic flowmeters; electrical tool measuring instruments; magnetometers; electric wires and cables; optical inspection apparatus and instruments; spectacles; marine radio electrical communication machines and apparatus; metronomes; magnetic object detectors; echo sounders; ultrasonic flaw detectors; computers; computer peripherals; computer operating programs, downloadable; computer operating programs, recorded; integrated circuits; electronic circuits; ozonisers being ozonators; electrolysers; electronic sports training simulators; simulators for the steering and control of vehicles; buzzers, electric; vehicle breakdown warning triangles; road signs, luminous or mechanical; railway signals; fire alarms; gas leak alarm sensors; burglar alarms; gloves for protection against accidents; fire extinguishers; fire hose nozzles; sprinkler systems for fire protection; fire boats; fire engines; protective helmets; fireproof garments; protective industrial respirators for filtering air; gas masks; welding masks; needles for surveying compasses; resistance wires; electrodes, other than welding electrodes or medical electrodes; cinematographic films, exposed; photographic slides; slide film mounts; mechanisms for coin-operated apparatus for operating gates for car parks; cash registers; coin counting or sorting machines; electronic machines for recording financial operations; photo-copying machines; manually operated calculators; mathematical instruments in the nature of calculators; time and date stamping machine; time clocks being time recording devices; punched card office machines; voting machines; automated billing machines for processing accounting information; slide-rules; weight belts for scuba diving; air tanks for scuba diving; regulators for scuba diving; breathing apparatus for underwater swimming; electronic integrated circuits and multimedia software recorded on CD-ROMs featuring programs for hand-held games with liquid crystal displays; egg-candlers; ear plugs for divers