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    Engineer working in factory, supervising industrial equipment. — Stock Photo
    Engineer working in factory, supervising industrial equipment.
    Supervisor using walkie-talkie in steel factory — Stock Photo
    Supervisor using walkie-talkie in steel factory
    High school teacher supervising students taking exam at tables — Stock Photo
    High school teacher supervising students taking exam at tables
    Young stylish man in elegant suit using tablet while controlling quality of factory maintenance. — Stock Photo
    Young stylish man in elegant suit using tablet while controlling quality of factory maintenance.
    Male teacher supervising students writing their GCSE exam in classroom — Stock Photo
    Male teacher supervising students writing their GCSE exam in classroom
    High school teacher supervising students taking exam at desks — Stock Photo
    High school teacher supervising students taking exam at desks
    Engineer working in factory, holding check-list and supervising. — Stock Photo
    Engineer working in factory, holding check-list and supervising.
    Worker looking up at businessman in factory office — Stock Photo
    Worker looking up at businessman in factory office
    Father supervising daughter swimming in pool — Stock Photo
    Father supervising daughter swimming in pool
    Supervisors talking on platform above steel factory — Stock Photo
    Supervisors talking on platform above steel factory
    Supervisor writing on clipboard in steel factory — Stock Photo
    Supervisor writing on clipboard in steel factory
    Smiling supervisor and worker at control panel in steel factory — Stock Photo
    Smiling supervisor and worker at control panel in steel factory
    Businessman in hard-hat looking over construction site — Stock Photo
    Businessman in hard-hat looking over construction site
    Teacher supervising high school students taking exam at desks — Stock Photo
    Teacher supervising high school students taking exam at desks
    College students taking test at desks in classroom — Stock Photo
    College students taking test at desks in classroom
    Professor watching college students taking test in classroom — Stock Photo
    Professor watching college students taking test in classroom
    Shop class teacher watching student in workshop — Stock Photo
    Shop class teacher watching student in workshop
    Engineer working in factory, holding check-list and supervising. — Stock Photo
    Engineer working in factory, holding check-list and supervising.
    Supervisor watching steel plant — Stock Photo
    Supervisor watching steel plant
    Supervisor and worker handshaking in factory — Stock Photo
    Supervisor and worker handshaking in factory
    Hands of engineer working in factory, holding check-list and supervising. — Stock Photo
    Hands of engineer working in factory, holding check-list and supervising.
    Workers reviewing paperwork at machinery control panel in steel factory — Stock Photo
    Workers reviewing paperwork at machinery control panel in steel factory
    Teacher supervising high school students taking exam at desks — Stock Photo
    Teacher supervising high school students taking exam at desks
    High school teacher supervising students taking exam at desks — Stock Photo
    High school teacher supervising students taking exam at desks
    View from above high school teacher supervising students taking exam — Stock Photo
    View from above high school teacher supervising students taking exam
    Instructor supervising high school students taking exam at desks — Stock Photo
    Instructor supervising high school students taking exam at desks
    Engineer working in factory, holding check-list and supervising. — Stock Photo
    Engineer working in factory, holding check-list and supervising.
    Supervisor with earplugs watching steel factory — Stock Photo
    Supervisor with earplugs watching steel factory
    High school teacher supervising students taking exam at desks — Stock Photo
    High school teacher supervising students taking exam at desks
    Supervisors on platform above steel factory — Stock Photo
    Supervisors on platform above steel factory
    Foreman guiding construction workers below crane at construction site — Stock Photo
    Foreman guiding construction workers below crane at construction site
    Engineer working in factory, holding check-list and supervising. — Stock Photo
    Engineer working in factory, holding check-list and supervising.
    High school teacher supervising students taking exam desks classroom — Stock Photo
    High school teacher supervising students taking exam desks classroom
    Formal man with tablet checking conditions on factory — Stock Photo
    Formal man with tablet checking conditions on factory
    Supervisor on platform looking out over factory — Stock Photo
    Supervisor on platform looking out over factory
    Friend supervising her friend as she descendes steep cliff in Wales — Stock Photo
    Friend supervising her friend as she descendes steep cliff in Wales
    Formal man with folder checking conditions on factory — Stock Photo
    Formal man with folder checking conditions on factory
    Engineer working in factory, holding check-list and supervising. — Stock Photo
    Engineer working in factory, holding check-list and supervising.
    Engineer working in factory, holding check-list and supervising. — Stock Photo
    Engineer working in factory, holding check-list and supervising.
    High school teacher supervising students taking exam at desks — Stock Photo
    High school teacher supervising students taking exam at desks
    High school teacher supervising students taking exam at desks — Stock Photo
    High school teacher supervising students taking exam at desks
    Elegant serious man standing at table of factory and reading documents. — Stock Photo
    Elegant serious man standing at table of factory and reading documents.
    Supervisor on platform over steel factory — Stock Photo
    Supervisor on platform over steel factory
    Supervisor using walkie-talkie in steel factory — Stock Photo
    Supervisor using walkie-talkie in steel factory
    Supervisor with clipboard in steel factory — Stock Photo
    Supervisor with clipboard in steel factory
    Father supervising daughter swimming in pool — Stock Photo
    Father supervising daughter swimming in pool
    Hands of engineer working in factory, holding check-list and supervising. — Stock Photo
    Hands of engineer working in factory, holding check-list and supervising.
    Businessman and workers in warehouse — Stock Photo
    Businessman and workers in warehouse
    Professor watching college students taking test in classroom — Stock Photo
    Professor watching college students taking test in classroom
    Male supervisors talking at window above factory floor — Stock Photo
    Male supervisors talking at window above factory floor
    High school teacher supervising students taking exam in classroom — Stock Photo
    High school teacher supervising students taking exam in classroom
    Engineer working in factory, holding check-list and supervising. — Stock Photo
    Engineer working in factory, holding check-list and supervising.
    Engineer working in factory, holding check-list and supervising. — Stock Photo
    Engineer working in factory, holding check-list and supervising.
    Formal man with tablet checking inspecting workshop. — Stock Photo
    Formal man with tablet checking inspecting workshop.
    High school teacher supervising students taking exam at desks — Stock Photo
    High school teacher supervising students taking exam at desks
    View from above high school teacher supervising students taking exam — Stock Photo
    View from above high school teacher supervising students taking exam
    Supervisors on platform over steel factory — Stock Photo
    Supervisors on platform over steel factory
    Portrait confident supervisor in steel factory — Stock Photo
    Portrait confident supervisor in steel factory
    Close up worker with clipboard in factory — Stock Photo
    Close up worker with clipboard in factory
    Serious man standing at table in workshop of factory and reading through documents. — Stock Photo
    Serious man standing at table in workshop of factory and reading through documents.