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Sikorsky H-5 helicopter built about 1950 and photographed in USA in 1964. Kodachrome scanned film with grain.
Happy teacher explaining mathematics at whiteboard in classroom. Portrait of smiling mathematics tutor explaining addition concept to children in classroom. Successful teacher standing in front of whiteboard with crossed arms after explaining addition to students.
Group of Latin American students paying attention in an anatomy class at the medical school
Education, smile and students at school for class, fun lesson and positive reinforcement. People, laugh or biology lecture in classroom with knowledge, growth or development with information for exam
Military helicopter in flight.
Szolnok, Hungary - August 18, 2022: Hungarian Air Force Mil Mi-24 Hind military attack helicopter. Flight operation. Aviation industry and rotorcraft. Transport and airlift. Fly and flying.
Portrait of child student girl during class at school
Silhouette of S Soviet helicopter Mi-8 common operational military aircraft aloft in the air cloudy sky
A police helicopter in flight in black and white
Army attack helicopter performing low level hover maneuver
UH-60 Black Hawk Military Helicopter flying
Air to air of a Sikorsky SH-60 Seahawk helicopter over Cumberland Island Georgia photograph taken March 2021
U.S. Navy SH-60 Seahawk helicopter. Click on an image to go to my Helicopters Lightbox
Soldiers in camouflage uniforms aiming their rifles ready to fire during military night operation
Happy Latin American medical students talking in class and sharing ideas - education concepts
Ulan-Ude, Republic of Buryatia, Russia - July 25 2008 OF THE YEAR Multipurpose helicopter Mi-8AMT shows aerobatics in the sky above the airfield
Military helicopter in mid-air
A group of mixed individuals are in a computer lab for class.
A young female teacher squats next to a little boy of Asian descent sitting at a desk, to help him use a tablet for schoolwork during class.
Technician is checking air conditioner. Air conditioning, HVAC service technician using gauges to check refrigerant and add refrigerant.
Helicopter, close-up.
Group of students raising their hand and asking question to the teacher in an IT class - education concepts
Businessman using laptop to online payment, banking and online shopping. financial transaction. Digital online payment concept.
closeup of airplane engine sheeting. Antonov. AN-26
Fun, happy and excited teacher talking to students in school classroom with group of learning children. Confident, friendly and cool woman asking diverse young kids education questions in study class
User give rating to service experience on online application, Customer review satisfaction feedback survey concept, Customer can evaluate quality of service leading to reputation ranking of business.
Schoolboy with freckles studying in class on first day of school
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Vertical image of female teacher using laptop in teaching and showing online materials to students during class in school or college
Free Images: "bestof:Navy 101217-N-6070S-097 Aviation Warfare Systems Operator 2nd Class Zachary Lungo, assigned to Helicopter Sea Combat Squadron (HSC) 26, prepares.jpg en MANAMA"
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