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Bike mechanic works on rear derailleur pulley and tightens screws as bicycle wheel spins in shop
Bike mechanic works on rear derailleur pulley and tightens screws as bicycle wheel spins in shop
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Skilled bike mechanic works on pulley with his hands as bicycle wheel spins in repair shop
Skilled bike mechanic works on pulley with his hands as bicycle wheel spins in repair shop
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Biofuel Recovered For Recycling At Restaurants
Workers pouring used cooking oil into a collection bin. Workers with the San Francisco Water Power and Sewer's SFGreasecycle program dump bottles of used cooking oil into a dumpster on April 5, 2013 in San Francisco, California. Launched...
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Biofuel Recovered For Recycling At Restaurants
Workers pouring used cooking oil into a collection bin. Workers with the San Francisco Water Power and Sewer's SFGreasecycle program dump bottles of used cooking oil into a dumpster on April 5, 2013 in San Francisco, California. Launched...
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Obama, Former Presidents Commemorate 50th Anniversary Of MLK's March On Washington
Panning Shot, People listen to U.S. President Barack Obama address the event. 'Let Freedom Ring Commemoration and Call to Action' honoring the 50th anniversary of the historic March on Washington for Jobs and Freedom on the National Mall...
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Obama, Former Presidents Commemorate 50th Anniversary Of MLK's March On Washington
Low Angle long Shot, People listen to U.S. President Barack Obama address the event. 'Let Freedom Ring Commemoration and Call to Action' honoring the 50th anniversary of the historic March on Washington for Jobs and Freedom on the...
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Obama, Former Presidents Commemorate 50th Anniversary Of MLK's March On Washington
Mid Shot, People listen to U.S. President Barack Obama address the event. 'Let Freedom Ring Commemoration and Call to Action' honoring the 50th anniversary of the historic March on Washington for Jobs and Freedom on the National Mall...
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Obama, Former Presidents Commemorate 50th Anniversary Of MLK's March On Washington
Low Angle Mid Shot, People listen to U.S. President Barack Obama address the event. 'Let Freedom Ring Commemoration and Call to Action' honoring the 50th anniversary of the historic March on Washington for Jobs and Freedom on the...
Getty Images
Obama, Former Presidents Commemorate 50th Anniversary Of MLK's March On Washington
Mid Shot, People listen to U.S. President Barack Obama address the event. 'Let Freedom Ring Commemoration and Call to Action' honoring the 50th anniversary of the historic March on Washington for Jobs and Freedom on the National Mall...
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Farming Biofuel Grains
HD 1080p: DOLLY SHOT of farmer inspecting his canola/rape seed crop. Canola is a common ingredient in the production of biofuel.
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carrying out experiments in a chemistry lab
carrying out experiments in a chemistry lab
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Young caregiver take care elderly woman on wheelchair
Young caregiver take care elderly woman on wheelchair