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    Engineer in electric power plant reviewing sensor readings with voltmeter probe — Stock Photo
    Engineer in electric power plant reviewing sensor readings with voltmeter probe
    Lab technician using flame test probe to gather sample from vile — Stock Photo
    Lab technician using flame test probe to gather sample from vile
    Engineer in electric power plant inspecting condenser room piping — Stock Photo
    Engineer in electric power plant inspecting condenser room piping
    Construction workers preparing for excavator to lift water main into place — Stock Photo
    Construction workers preparing for excavator to lift water main into place
    Lab technician removing sample vial cap — Stock Photo
    Lab technician removing sample vial cap
    Lab technician picking up samples — Stock Photo
    Lab technician picking up samples
    Archaeologist analyzing ancient artifact in laboratory. — Stock Photo
    Archaeologist analyzing ancient artifact in laboratory.
    Water department technician using flow rate sensor — Stock Photo
    Water department technician using flow rate sensor
    Cable lineman holding onto pole while using lineman spikes to adjust tension — Stock Photo
    Cable lineman holding onto pole while using lineman spikes to adjust tension
    Communications engineer using walkie-talkie at satellite antenna facility — Stock Photo
    Communications engineer using walkie-talkie at satellite antenna facility
    Power engineer walking toward solar photovoltaic array — Stock Photo
    Power engineer walking toward solar photovoltaic array
    Lab technician holding sample in flame — Stock Photo
    Lab technician holding sample in flame
    Pest control technician adding water to chemical container in truck — Stock Photo
    Pest control technician adding water to chemical container in truck
    Midsection of archaeologist analyzing charred wood in petri dish. — Stock Photo
    Midsection of archaeologist analyzing charred wood in petri dish.
    Male archaeologist putting ancient weight in plastic bag, female archaeologist marking artifact with serial number. — Stock Photo
    Male archaeologist putting ancient weight in plastic bag, female archaeologist marking artifact with serial number.
    Portrait of young female archaeologist analyzing charred wood in petri dish. — Stock Photo
    Portrait of young female archaeologist analyzing charred wood in petri dish.
    Portrait of a carpenter holding a level on house framing — Stock Photo
    Portrait of a carpenter holding a level on house framing
    Construction workers preparing to climb down hole with ladder — Stock Photo
    Construction workers preparing to climb down hole with ladder
    Hands of archaeologist analyzing charred wood in petri dish. — Stock Photo
    Hands of archaeologist analyzing charred wood in petri dish.
    Lineman carrying a ladder back to his truck — Stock Photo
    Lineman carrying a ladder back to his truck
    Communications worker loading a ladder onto a truck — Stock Photo
    Communications worker loading a ladder onto a truck
    Project engineer with a Spinal Cord Injury in a wheelchair at job site — Stock Photo
    Project engineer with a Spinal Cord Injury in a wheelchair at job site
    Archaeologist measuring ancient loom weights on digital scale in laboratory. — Stock Photo
    Archaeologist measuring ancient loom weights on digital scale in laboratory.
    Engineer at electric power plant carrying coil of wire at storage area — Stock Photo
    Engineer at electric power plant carrying coil of wire at storage area
    Communications worker on a power pole attaching clips to support cable — Stock Photo
    Communications worker on a power pole attaching clips to support cable
    Carpenters positioning a large window frame on a house under construction — Stock Photo
    Carpenters positioning a large window frame on a house under construction
    Archaeologists analyzing ancient artifacts in laboratory. — Stock Photo
    Archaeologists analyzing ancient artifacts in laboratory.
    Midsection of archaeologists comparing pottery colors with color chart scheme in laboratory. — Stock Photo
    Midsection of archaeologists comparing pottery colors with color chart scheme in laboratory.
    Archaeologists analyzing ancient fishing weight artifacts. — Stock Photo
    Archaeologists analyzing ancient fishing weight artifacts.
    Hands of archaeologists reconstructing broken pottery in laboratory. — Stock Photo
    Hands of archaeologists reconstructing broken pottery in laboratory.
    Close-up of archaeology researcher documenting lithics with camera in laboratory. — Stock Photo
    Close-up of archaeology researcher documenting lithics with camera in laboratory.
    Archaeology researchers in laboratory reconstructing usage of ancient axe tool. — Stock Photo
    Archaeology researchers in laboratory reconstructing usage of ancient axe tool.
    Portrait of young female archaeologist working with microscope. — Stock Photo
    Portrait of young female archaeologist working with microscope.
    Carpenter measuring rafter length for house construction — Stock Photo
    Carpenter measuring rafter length for house construction
    Portrait of young female archaeologist using and looking in microscope in laboratory. — Stock Photo
    Portrait of young female archaeologist using and looking in microscope in laboratory.
    Project engineer with a Spinal Cord Injury in a wheelchair closing fence to job site — Stock Photo
    Project engineer with a Spinal Cord Injury in a wheelchair closing fence to job site
    Young archaeology researchers documenting lithics with camera in laboratory and taking notes. — Stock Photo
    Young archaeology researchers documenting lithics with camera in laboratory and taking notes.
    Midsection of archaeologist reconstructing broken pottery in laboratory. — Stock Photo
    Midsection of archaeologist reconstructing broken pottery in laboratory.
    Carpenter measuring a laminated beam — Stock Photo
    Carpenter measuring a laminated beam
    Carpenter marking bevel cuts on rafter — Stock Photo
    Carpenter marking bevel cuts on rafter
    Archaeology researcher in laboratory demonstrating antler use as tool in prehistory. — Stock Photo
    Archaeology researcher in laboratory demonstrating antler use as tool in prehistory.
    Lab technician collecting data on sterilization — Stock Photo
    Lab technician collecting data on sterilization
    Hands of archaeologist measuring ancient hook with straightedge in archeology lab. — Stock Photo
    Hands of archaeologist measuring ancient hook with straightedge in archeology lab.
    Female archaeology researcher documenting lithics with camera in laboratory. — Stock Photo
    Female archaeology researcher documenting lithics with camera in laboratory.
    Portrait of young female archaeologist using microscope in laboratory. — Stock Photo
    Portrait of young female archaeologist using microscope in laboratory.
    Archaeologists measuring ancient artifacts on digital scale in laboratory. — Stock Photo
    Archaeologists measuring ancient artifacts on digital scale in laboratory.
    Portrait of young archaeologist analyzing charred wood in petri dish. — Stock Photo
    Portrait of young archaeologist analyzing charred wood in petri dish.
    Archaeology researcher in laboratory reconstructing ancient tool. — Stock Photo
    Archaeology researcher in laboratory reconstructing ancient tool.
    Carpenter reviewing home construction plans on site — Stock Photo
    Carpenter reviewing home construction plans on site
    Archaeology researcher in laboratory reconstructing ancient tool. — Stock Photo
    Archaeology researcher in laboratory reconstructing ancient tool.
    Young archaeologists comparing pottery colors with color chart scheme in laboratory. — Stock Photo
    Young archaeologists comparing pottery colors with color chart scheme in laboratory.
    Hands of archaeologist comparing pottery colors with color chart scheme in laboratory. — Stock Photo
    Hands of archaeologist comparing pottery colors with color chart scheme in laboratory.
    Project engineer with a Spinal Cord Injury in a wheelchair at job site — Stock Photo
    Project engineer with a Spinal Cord Injury in a wheelchair at job site
    Young archaeology researchers documenting lithics with camera in laboratory. — Stock Photo
    Young archaeology researchers documenting lithics with camera in laboratory.
    Female scientist holding micro tube with sample in ancient DNA laboratory. — Stock Photo
    Female scientist holding micro tube with sample in ancient DNA laboratory.
    Engineer in electric power plant studying movement of overhead crane — Stock Photo
    Engineer in electric power plant studying movement of overhead crane
    Bioarchaeologists analyzing human osteological material in laboratory. — Stock Photo
    Bioarchaeologists analyzing human osteological material in laboratory.
    Close-up of archaeology researcher documenting lithics with camera in laboratory. — Stock Photo
    Close-up of archaeology researcher documenting lithics with camera in laboratory.
    Bioarcheology scientists analyzing human skull in DNA archaeology lab. — Stock Photo
    Bioarcheology scientists analyzing human skull in DNA archaeology lab.
    Young female archaeology researcher in laboratory analyzing ancient antler tool. — Stock Photo
    Young female archaeology researcher in laboratory analyzing ancient antler tool.