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    Human heart circulatory and electrical system, 3d illustration. Cross section of the heart showing the ventricles and valves, and the electrical (conduction) system (yellow lines) and circulatory system (red and blue lines). — Stock Photo
    Human heart circulatory and electrical system, 3d illustration. Cross section of the heart showing the ventricles and valves, and the electrical (conduction) system (yellow lines) and circulatory system (red and blue lines).
    Close-up of audio cables connected to mixing console in recording studio — Stock Photo
    Close-up of audio cables connected to mixing console in recording studio
    Power line in row — Stock Photo
    Power line in row
    Close-up of girl hands soldering circuit board at desk. — Stock Photo
    Close-up of girl hands soldering circuit board at desk.
    Close-up of digital tablet and circuit board on table — Stock Photo
    Close-up of digital tablet and circuit board on table
    Iron Gate, Hydroelectric Power Station, the largest dam on the Danube River and one of the largest hydro power plants in Europe; Drobeta-Turnu Severin, Judeul Mehedini, Serbia — Stock Photo
    Iron Gate, Hydroelectric Power Station, the largest dam on the Danube River and one of the largest hydro power plants in Europe; Drobeta-Turnu Severin, Judeul Mehedini, Serbia
    Power Plant Exterior, low angle view — Stock Photo
    Power Plant Exterior, low angle view
    Focused IT technician examining connection plugs in server room — Stock Photo
    Focused IT technician examining connection plugs in server room
    Senior man working on electrical wiring — Stock Photo
    Senior man working on electrical wiring
    Patient with a heart pacemaker — Stock Photo
    Patient with a heart pacemaker
    Focused male IT technician working in server room — Stock Photo
    Focused male IT technician working in server room
    Nerve cells and axon connections — Stock Photo
    Nerve cells and axon connections
    Woman wearing headphones and holding a mug. — Stock Photo
    Woman wearing headphones and holding a mug.
    Young woman in a shop — Stock Photo
    Young woman in a shop
    Boy using electronic tablet — Stock Photo
    Boy using electronic tablet
    Close up of a woman using a credit card — Stock Photo
    Close up of a woman using a credit card
    Wind farm in Northern India; Rajasthan, India — Stock Photo
    Wind farm in Northern India; Rajasthan, India
    Electrical drill machine in workshop — Stock Photo
    Electrical drill machine in workshop
    Woman drawing a sketch in a book at home — Stock Photo
    Woman drawing a sketch in a book at home
    Elementary age boy lying on grass and playing handheld electronic game. — Stock Photo
    Elementary age boy lying on grass and playing handheld electronic game.
    High angle view of robotics engineer assembling circuit board at desk — Stock Photo
    High angle view of robotics engineer assembling circuit board at desk
    Computer circuit boards — Stock Photo
    Computer circuit boards
    Road Through A Rural Area — Stock Photo
    Road Through A Rural Area
    Woman sitting on floor in rehearsal studio — Stock Photo
    Woman sitting on floor in rehearsal studio
    Teenage girl wearing headphones as doing watercolor painting in notebook — Stock Photo
    Teenage girl wearing headphones as doing watercolor painting in notebook
    Industrial robotic arm working at high tech factory. — Stock Photo
    Industrial robotic arm working at high tech factory.
    Factory of milking goats to machine — Stock Photo
    Factory of milking goats to machine
    Marabou stork (Leptoptilos crumenifer) and black kites (Milvus migrans) sitting on a power line; Hoima, Western Region, Uganda — Stock Photo
    Marabou stork (Leptoptilos crumenifer) and black kites (Milvus migrans) sitting on a power line; Hoima, Western Region, Uganda
    Woman wearing headphones in rehearsal studio — Stock Photo
    Woman wearing headphones in rehearsal studio
    Tangled electrical wires; Kathmandu, Nepal — Stock Photo
    Tangled electrical wires; Kathmandu, Nepal
    Teenage girl at home wearing headphones as painting, side view. — Stock Photo
    Teenage girl at home wearing headphones as painting, side view.
    Aerial view of a road winding through farmland divided into green and brown, with an electricity transmission line running across; Colorado, United States of America — Stock Photo
    Aerial view of a road winding through farmland divided into green and brown, with an electricity transmission line running across; Colorado, United States of America
    Female patient sitting in ward with transcutaneous electrical nerve stimulation. — Stock Photo
    Female patient sitting in ward with transcutaneous electrical nerve stimulation.
    Stripped copper cables, digital illustration. — Stock Photo
    Stripped copper cables, digital illustration.
    Student examining electrical control system on furnace with professor in HVAC classroom one student in wheelchair — Stock Photo
    Student examining electrical control system on furnace with professor in HVAC classroom one student in wheelchair
    Electric car being charged — Stock Photo
    Electric car being charged
    Close-up of audio cables in recording studio — Stock Photo
    Close-up of audio cables in recording studio
    Worker sharpening axe with electric grinder — Stock Photo
    Worker sharpening axe with electric grinder
    Large metal wind turbines on rolling hills with blue sky, North of Waterton; Alberta, Canada — Stock Photo
    Large metal wind turbines on rolling hills with blue sky, North of Waterton; Alberta, Canada
    Little boy with a drainer on his head having fun with a wringer and salad cutlery. — Stock Photo
    Little boy with a drainer on his head having fun with a wringer and salad cutlery.
    Woman drawing a sketch in a book at home — Stock Photo
    Woman drawing a sketch in a book at home
    Female engineers with digital tablet at sunny power plant — Stock Photo
    Female engineers with digital tablet at sunny power plant
    Several employees working in a factory on your table — Stock Photo
    Several employees working in a factory on your table
    Fyris River And Pump House — Stock Photo
    Fyris River And Pump House
    Smoke emitting from factory smoke stack — Stock Photo
    Smoke emitting from factory smoke stack
    Gas turbine engine at an electricity cogeneration plant — Stock Photo
    Gas turbine engine at an electricity cogeneration plant
    Wind turbine amongst olive trees; Campillos, Malaga, Andalucia, Spain — Stock Photo
    Wind turbine amongst olive trees; Campillos, Malaga, Andalucia, Spain
    Chef pouring edible oil in a grinder in commercial kitchen — Stock Photo
    Chef pouring edible oil in a grinder in commercial kitchen
    Mother teaching daughter about soldering iron in office. — Stock Photo
    Mother teaching daughter about soldering iron in office.
    Interior of carpentry workshop — Stock Photo
    Interior of carpentry workshop
    Two boys using digital tablet — Stock Photo
    Two boys using digital tablet
    Caustic and acid mixing area of electric power plant — Stock Photo
    Caustic and acid mixing area of electric power plant
    Man with music headphones in car — Stock Photo
    Man with music headphones in car
    Father teaching daughter about soldering iron in office. — Stock Photo
    Father teaching daughter about soldering iron in office.
    Man sitting on floor in rehearsal studio — Stock Photo
    Man sitting on floor in rehearsal studio
    Power engineers placing ladder inside manhole at high voltage power distribution station — Stock Photo
    Power engineers placing ladder inside manhole at high voltage power distribution station
    Stairway in house under construction, Norfolk, Virginia, USA — Stock Photo
    Stairway in house under construction, Norfolk, Virginia, USA
    Robotics engineer checking circuit board in warehouse — Stock Photo
    Robotics engineer checking circuit board in warehouse
    Electrical power lines through a rural landscape at sunset, USA — Stock Photo
    Electrical power lines through a rural landscape at sunset, USA
    Industrial steel hawsers — Stock Photo
    Industrial steel hawsers