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Refractory materials, metakaolin
Refractory materials, alumina rich clay based, 45 to 85% aluminium oxide
Refractory materials, 85 to 99% alumina
Refractory materials, corundum, 85 to 99% alumina
Refractory materials, kyanite/disthene, 45 to 85% alumina
Refractory materials, synthetic mullite, 45 to 85% alumina
Refractory materials, sillimanite/fibrolite, 45 to 85% alumina
Refractory materials, andalusite, 45 to 85% alumina
Refractory materials, bauxite and diaspore, 45 to 85% alumina
Refractory materials, olivine, phosphorite and serpentine based
Refractory materials, magnesia
Refractory materials, zirconium oxide
Refractory materials, magnesium or magnesium-chromite, metal coated
Refractory materials, chrome magnesite
Refractory materials, chromite
Refractory materials, chrome dolomite
Refractory materials, dolomite
Refractory materials, magnesite, raw and fired
Refractory materials, magnesite, sintered and ground
Refractory materials, cristobalite-zirconium
Refractory materials, zircon
Refractory materials, siliceous, 15 to 25% alumina
Refractory products, silicon carbide
Refractory materials, pure oxide
Refractory materials, plastic (mouldable)
Castable refractory concrete
Refractory cements
Grouts and mortars, refractory
Powders, refractory
Refractory aggregates
Refractory products for insulating
Pastes, refractory
Ceramic-metal (cermet) refractories
Colloidal bonded refractories
Refractory materials, mouldable
Ramming refractories
Filling mixes, refractory, resin-bonded, for the steel industry
Refractory materials for boiler furnaces
Refractory materials for induction furnaces
Refractory materials for foundries, the steel industry, blast furnace stoves
Refractory materials for gasworks
Refractory materials for the glass industry
Refractory materials for the ceramics industry
Refractory materials for the electrical industry
Refractory materials for the cement industry
Refractory materials for nuclear reactors
Cameras, astronomy
Colposcopes
Orthoptic apparatus
Ophthalmoscopes
Optometers
Retinoscopes
Exophthalmometers
Scotometers
Ophthalmodynamometers
Perimeters
Ophthalmometers
Keratoscopes, electronic
Tonometers
Dioptometers
Pupillometers
Phoropters
Ophthalmic screens, visual field tests
Amblyopia treatment apparatus
Charts, sight testing
Photo-coagulating appliances, medical, retina treatment
Ophthalmoscopic lamps
Ophthalmic examination chairs and fittings
Electromagnetic appliances, ophthalmic, extraction of ferrous splinters
Ophthalmic instrument accessories
Ophthalmic instrument kits
Lasers, medical applications
Astrographs
Helioscopes
Reflectors, astronomical
Refractors, astronomical
Spectroscopes, astronomical
Spectrographs, astronomical
Astrolabes, Danjon prism
Theodolites, universal, astronomical (altazimuths)
Meridian circles, azimuthal circles
Astronomical clocks
Chronographs, astronomical, recording and printing
Sextants
Cameras, satellite
Image enhancement and pattern recognition equipment, electronic, for observatories
Micro-optical components for lasers
Laser crystals
Optical beam splitters, cube and plate
Telescopes, astronomical
Polarisation glass
Optical filters, infrared
Optical filters, ultraviolet (UV)
Optical filters, polarising
Optical filters, monochromatic
Optical filters, colour
Optical filters, dichroic
Optical filters, fluorescent
Optical filters, neutral density
Optical filters, interference
Optical filters, polariser
Optical wedges, laser
Optical wedges, neutral density
Optical wedges, photometric
Filters for contrast enhancements
Filters for sunglasses and industrial protective goggles
Optical mirrors, galvanometer
Components, optical, for marine searchlights
Optical components for lasers
Optical diffusers
Optical mirrors, projector
Optical mirrors, computerised, thermal, for use in space
Optical prisms, standard, for apparatus testing
Optical prisms, beam splitting, for colour televisions
Optical prisms for optical instruments
Optical gratings, diffraction
Optical components, thin film
Optical windows, lens protection
Optical lenses for camera lenses
Lenses, dummy, for display purposes
Optical lenses, flat or curved, for industrial use
Optical lenses, glass, for binoculars, magnifiers and projectors
Optical lenses for passive infrared detectors
Optical lenses for scientific equipment
Optical lenses for endoscopes
Optical lenses for mobile telephone (cellular phone) cameras
Optical lenses for interferometers
Optical lenses for compact disc (CD) and digital versatile disc (DVD) players
Optical lenses and mirrors for light condensers
Lenses and reflectors for photoelectric cells
Lenses, stage lighting
Accessories for spectacles
Spectacle frames, glass
Spectacle frames, metal
Spectacle frames, plastic
Spectacle frames, tortoiseshell and horn
Spectacle frames, carbon
Spectacle frames, juvenile size
Spectacle frames, trial, for opticians
Monocles and monocle rims
Pince-nez and pince-nez frames
Lorgnettes and lorgnette frames
Shapes, semi-finished, nickel silver, for spectacle frames
Spectacle frame components
Sunglasses
Spectacles, plastic framed
Spectacles, tortoiseshell framed
Spectacles, rimless
Spectacles, folding
Spectacles, mirror
Spectacles, anti-fog, anti-glare
Spectacles, juvenile size
Test spectacles, opticians'
Spectacles, television
Goggles, sports
Reading glasses, non-prescription
Optical lenses, machined, for protective goggles
Lenses, trial, cased, ophthalmic
Intraocular (permanent) lenses
Cleaning kits for contact lenses
Spectacle lenses
Contact lenses
Image analysers
Tension indicators, mechanical or optical, for ropes or cables
Torque indicators, mechanical
Gauges, measuring, mechanical, for threads
Gauges, measuring, mechanical, for holes
Gauges, measuring, mechanical, for length and diameter
Transducer calibration equipment, mechanical
Rotation monitors, mechanical
Borescopes
Shaft position, speed and movement monitors
Dial gauges
Linear speed indicators
Bone densitometers/osteometers
Fibrescopes, industrial
Auxometers/dynameters
Absolute gravity meters
Ellipsometers
Gauges, thickness
Gauges, radius
Gauges, wire
Gauges, angle
Gyroscopes and gyrometers
Accelerometers
Conveyor belt tension measuring equipment
Position measuring systems, machine tool
Squares, metal, high precision
Squares and bevels, engineers'
Gauges, precision clearance, for plastics
Measuring instruments, optical, size and shape
Optical compensators, Babinet compensators
Gauges, width, optical
Comparators, optical
Micrometers, optical, contactless, laser
Instruments, optical, cavity examination
Photoelasticity measuring equipment, optical
Micrometers, internal
Micrometers, external
Micrometers, digital display
Micrometers, optical
Endoscopes, high temperature applications
Endoscopes, industrial
Calipers and dividers, metalwork
Calipers, lens
Calipers, electronic
Calipers, screw thread
Calipers, vernier or sliding
Calipers, external, metalwork
Calipers, internal, metalwork
Calipers and dividers, woodworking
Depth gauges
