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    Heavy construction equipment operator in excavator — Stock Photo
    Heavy construction equipment operator in excavator
    Male student showing clipboard to classmate while practicing chemistry experiment in lab — Stock Photo
    Male student showing clipboard to classmate while practicing chemistry experiment in lab
    Lineman on a pole working on phone and cable wires — Stock Photo
    Lineman on a pole working on phone and cable wires
    Female college student looking at chemicals in beaker on table — Stock Photo
    Female college student looking at chemicals in beaker on table
    Construction worker watching as old watermain is removed with excavator from street — Stock Photo
    Construction worker watching as old watermain is removed with excavator from street
    Scenic view of Spring Point Ledge Lighthouse, Portland, Maine, United States — Stock Photo
    Scenic view of Spring Point Ledge Lighthouse, Portland, Maine, United States
    Construction worker guiding water main into place — Stock Photo
    Construction worker guiding water main into place
    Close up of male student practicing experiment in lab — Stock Photo
    Close up of male student practicing experiment in lab
    Portrait of teenage girl with arms crossed standing by desk in lab — Stock Photo
    Portrait of teenage girl with arms crossed standing by desk in lab
    Portrait of college students with arms crossed standing in lab — Stock Photo
    Portrait of college students with arms crossed standing in lab
    Portrait of male college student with arms crossed standing in lab — Stock Photo
    Portrait of male college student with arms crossed standing in lab
    Communications worker drilling access hole through exterior wall — Stock Photo
    Communications worker drilling access hole through exterior wall
    Attentive wielder working in workshop — Stock Photo
    Attentive wielder working in workshop
    Construction worker guiding chain attached to excavator — Stock Photo
    Construction worker guiding chain attached to excavator
    Side view of female hiker with sunglasses standing on field — Stock Photo
    Side view of female hiker with sunglasses standing on field
    Portrait confident male electrician student — Stock Photo
    Portrait confident male electrician student
    Young students practicing chemistry experiment in lab — Stock Photo
    Young students practicing chemistry experiment in lab
    Construction workers guiding water main into place — Stock Photo
    Construction workers guiding water main into place
    Young male student using microscope in lab — Stock Photo
    Young male student using microscope in lab
    Construction workers using torque wrench to secure water main section with bolts — Stock Photo
    Construction workers using torque wrench to secure water main section with bolts
    Male student practicing experiment in lab — Stock Photo
    Male student practicing experiment in lab
    Teenage girl performing experiment in chemistry lab — Stock Photo
    Teenage girl performing experiment in chemistry lab
    Construction workers attaching sections of water main together in front of excavator — Stock Photo
    Construction workers attaching sections of water main together in front of excavator
    Engineer in electric power plant adjusting manual valve in condenser room piping — Stock Photo
    Engineer in electric power plant adjusting manual valve in condenser room piping
    Close up of female student practicing experiment in lab — Stock Photo
    Close up of female student practicing experiment in lab
    Lineman climbing a pole for installation — Stock Photo
    Lineman climbing a pole for installation
    Construction worker using strap on excavator to guide water main section — Stock Photo
    Construction worker using strap on excavator to guide water main section
    Tensed colleagues sitting at desk in office — Stock Photo
    Tensed colleagues sitting at desk in office
    Construction supervisor using surveying rod — Stock Photo
    Construction supervisor using surveying rod
    Construction workers cutting water main to length with gas powered saw — Stock Photo
    Construction workers cutting water main to length with gas powered saw
    Engineer in electric power plant inspecting a electrically controlled valve — Stock Photo
    Engineer in electric power plant inspecting a electrically controlled valve
    Side view of male college student practicing chemistry experiment in lab — Stock Photo
    Side view of male college student practicing chemistry experiment in lab
    Female students performing chemistry experiment in lab — Stock Photo
    Female students performing chemistry experiment in lab
    Scenic view of rusty lighthouse in ocean — Stock Photo
    Scenic view of rusty lighthouse in ocean
    Construction supervisor using electronic surveying rod — Stock Photo
    Construction supervisor using electronic surveying rod
    Construction workers climbing down ladder into shoring — Stock Photo
    Construction workers climbing down ladder into shoring
    Cropped image of senior woman with wrinkled hand using pendant with emergency button — Stock Photo
    Cropped image of senior woman with wrinkled hand using pendant with emergency button
    Construction workers taking a break — Stock Photo
    Construction workers taking a break
    Smiling woman with dirty face fastening safety belt on cute boy in modern car — Stock Photo
    Smiling woman with dirty face fastening safety belt on cute boy in modern car
    Teenage girl using tablet while standing in lab — Stock Photo
    Teenage girl using tablet while standing in lab
    Young male student practicing experiment while standing in lab — Stock Photo
    Young male student practicing experiment while standing in lab
    Point of Ayre Lighthouse on the North coast of Wales; Wales — Stock Photo
    Point of Ayre Lighthouse on the North coast of Wales; Wales
    Young male student using vise grip in shop class workshop — Stock Photo
    Young male student using vise grip in shop class workshop
    Construction workers preparing to climb down hole with ladder — Stock Photo
    Construction workers preparing to climb down hole with ladder
    Female student with arms crossed standing in lab — Stock Photo
    Female student with arms crossed standing in lab
    Construction workers attaching sections of water main together in front of excavator — Stock Photo
    Construction workers attaching sections of water main together in front of excavator
    Cable installer applying weather proof sealant to the cable installation — Stock Photo
    Cable installer applying weather proof sealant to the cable installation
    Man with Williams Syndrome taking out the trash — Stock Photo
    Man with Williams Syndrome taking out the trash
    College students using microscope while practicing experiment in lab — Stock Photo
    College students using microscope while practicing experiment in lab
    Hispanic carpenter using finish trowel to roughen stairway footing concrete — Stock Photo
    Hispanic carpenter using finish trowel to roughen stairway footing concrete
    Carpenter using a circular saw for cutting rafter — Stock Photo
    Carpenter using a circular saw for cutting rafter
    Female power engineer adjusting water valves at power plant — Stock Photo
    Female power engineer adjusting water valves at power plant
    Communications worker carrying a ladder from truck to make installation — Stock Photo
    Communications worker carrying a ladder from truck to make installation
    Female power engineer putting equipment into bucket truck — Stock Photo
    Female power engineer putting equipment into bucket truck
    Construction worker climbing down ladder into shoring — Stock Photo
    Construction worker climbing down ladder into shoring
    Hispanic carpenters using trowel to smooth concrete for staircase footing — Stock Photo
    Hispanic carpenters using trowel to smooth concrete for staircase footing
    Male electrician students practicing in workshop — Stock Photo
    Male electrician students practicing in workshop
    Carpenter preparing to use level on house framing — Stock Photo
    Carpenter preparing to use level on house framing
    Female power engineer climbing inside safety cage ladder at power station — Stock Photo
    Female power engineer climbing inside safety cage ladder at power station
    Carpenter moving roof rafter into place — Stock Photo
    Carpenter moving roof rafter into place