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Three sets of LED traffic lights showing red, amber or green lights.

Three sets of LED traffic lights showing red, amber or green lights.

#405924031
Book binding technique: saddle stitched.

Book binding technique: saddle stitched.

#367100553
Book binding technique: saddle stitched.

Book binding technique: saddle stitched.

#367100524
A clean, simple and stylish periodic table of the elements with pastel / lightly shaded colours.

A clean, simple and stylish periodic table of the elements with pastel / lightly shaded colours.

#405919183
Book binding technique: perfect bound.

Book binding technique: perfect bound.

#367100449
Book binding technique: sewn bound.

Book binding technique: sewn bound.

#367100696
Computer keyboard key caps: WASD gaming keys.

Computer keyboard key caps: WASD gaming keys.

#404615008
A selection of different hopscotch games. In isometric.

A selection of different hopscotch games. In isometric.

#380746951
Computer keyboard key caps: Esc, Any, F1 Help, No, Yes, OK, Run, Stop, Go, Return, Enter.

Computer keyboard key caps: Esc, Any, F1 Help, No, Yes, OK, Run, Stop, Go, Return, Enter.

#404614795
Cross-section diagram of a double glazed window.

Cross-section diagram of a double glazed window.

#365883004
A zoetrope with frames of a running horse.

A zoetrope with frames of a running horse.

#404895445
An Australian Rules football.

An Australian Rules football.

#405912736
Computer keyboard key caps: spelling P-O-R-N.

Computer keyboard key caps: spelling P-O-R-N.

#404614835
Hand holding up a concession card with a photograph.

Hand holding up a concession card with a photograph.

#558150032
Line drawing of a tram or light rail public transport vehicle. Four-car. Line art.

Line drawing of a tram or light rail public transport vehicle. Four-car. Line art.

#365024073
An excess gas burn-off flare tower.

An excess gas burn-off flare tower.

#405857168
An electron microscope for looking at tiny specimens.

An electron microscope for looking at tiny specimens.

#405554628
A voice-over-IP desktop phone with a small LCD screen.

A voice-over-IP desktop phone with a small LCD screen.

#405900762
A tram or light rail public transport vehicle. Five-car.

A tram or light rail public transport vehicle. Five-car.

#363934897
A helical wind turbine.

A helical wind turbine.

#405498824
A hand held barcode scanner / gun with keypad and screen.

A hand held barcode scanner / gun with keypad and screen.

#405500552
A transportable weather station with solar panel, antenna, wind vane, wind speed sensor, rain gauge and thermometer/hygrometer.

A transportable weather station with solar panel, antenna, wind vane, wind speed sensor, rain gauge and thermometer/hygrometer.

#405539072
Two sets of LED pedestrian traffic lights showing walk and don't walk.

Two sets of LED pedestrian traffic lights showing walk and don't walk.

#405923785
A set of woodworking/carpentry joints.

A set of woodworking/carpentry joints.

#405912219
People icons: airport/transport security. Metal detector arch, metal detector wand and full body scanner.

People icons: airport/transport security. Metal detector arch, metal detector wand and full body scanner.

#389694891
Electronic keycard door opening instructions diagram. Tap card / contactless.

Electronic keycard door opening instructions diagram. Tap card / contactless.

#367103007
An exploded diagram of an induction cooker. With text labels.

An exploded diagram of an induction cooker. With text labels.

#386444594
Trash/rubbish dumpster icons with fire. Dumpster fire concept.

Trash/rubbish dumpster icons with fire. Dumpster fire concept.

#357621339
A roadside municipal telecommunications node cabinet with high voltage and laser radiation warning stickers.

A roadside municipal telecommunications node cabinet with high voltage and laser radiation warning stickers.

#389688251
Line drawing of a tram or light rail public transport vehicle. Five-car. Line art.

Line drawing of a tram or light rail public transport vehicle. Five-car. Line art.

#365024104
A caulking gun with a squiggle of caulking compound.

A caulking gun with a squiggle of caulking compound.

#382955979
A plain rotary business card / index card file.

A plain rotary business card / index card file.

#371821835
Concept: the digital divide.

Concept: the digital divide.

#404612759
Diagram: Place setting for a formal dinner with soup and salad courses.

Diagram: Place setting for a formal dinner with soup and salad courses.

#405222953
Diagram showing how a cyclonic separator works.

Diagram showing how a cyclonic separator works.

#404899100
Cross-section diagram of a single glazed window.

Cross-section diagram of a single glazed window.

#365883013
Concept: mobile cell phone tower triangulation. Three cell towers with intersecting signals.

Concept: mobile cell phone tower triangulation. Three cell towers with intersecting signals.

#353205079
Book binding technique: case bound.

Book binding technique: case bound.

#367100075
Crime scene outline of a body on the ground with a blood spatter and three yellow evidence flags.

Crime scene outline of a body on the ground with a blood spatter and three yellow evidence flags.

#363635261
People icons: airport/transport security. Body pat-down and cavity search.

People icons: airport/transport security. Body pat-down and cavity search.

#389694960
Line drawing of a tram or light rail public transport vehicle. Three-car. Line art.

Line drawing of a tram or light rail public transport vehicle. Three-car. Line art.

#365024000
3D printing technology concept: Selective Laser Sintering (SLS) or Selective Laser Melting (SLM) using a UV laser to melt / sinter a powder base.

3D printing technology concept: Selective Laser Sintering (SLS) or Selective Laser Melting (SLM) using a UV laser to melt / sinter a powder base.

#355470032
A lithium ion or lithium metal hydride battery shipment caution label.

A lithium ion or lithium metal hydride battery shipment caution label.

#356163769
A box of 10 morphine vials.

A box of 10 morphine vials.

#405284038
A ream of bright white copier/printer paper.

A ream of bright white copier/printer paper.

#404898842
PVC pipe fittings: a selection of misc pieces and accessories.

PVC pipe fittings: a selection of misc pieces and accessories.

#405247590
A $50 gift card, front and back, shown front-on.

A $50 gift card, front and back, shown front-on.

#405431129
An airport security full body scanner with a sign and two displays.

An airport security full body scanner with a sign and two displays.

#405540374
A carton of bright white copier/printer paper.

A carton of bright white copier/printer paper.

#404898979