4K Animated continuous line drawing of a male engineer or architect wearing hard hat holding blueprints and pointing forward 股票视频 Animated continuous line drawing of a male engineer or architect wearing hard hat holding blueprints and pointing forward 股票视频
4K Professional male engineer concentrated on testing complex electronic board smart specialist adjusts microchip components inside 股票录像 Professional male engineer concentrated on testing complex electronic board smart specialist adjusts microchip components inside 股票录像
4K 办公室里的建筑师、男子和笔记本电脑，正在进行土木工程、研究和网络输入。男性工程师、技术和 影视素材 办公室里的建筑师、男子和笔记本电脑，正在进行土木工程、研究和网络输入。男性工程师、技术和 影视素材
HD Male engineer monitoring production line via computer screen automated factory management control male engineer monitoring 影视素材 Male engineer monitoring production line via computer screen automated factory management control male engineer monitoring 影视素材
4K Connection and mounting of solar panels worker fasten technician installing on metal stand connecting panel working with 股票录像 Connection and mounting of solar panels worker fasten technician installing on metal stand connecting panel working with 股票录像
4K Male engineer speaking on smartphone on solar farm male engineer speaking on smartphone on solar farm low angle man in uniform 股票录像 Male engineer speaking on smartphone on solar farm male engineer speaking on smartphone on solar farm low angle man in uniform 股票录像
4K Confident engineer in hard hat walks towards camera clipboard in hand a confident engineer walks towards the camera clipboard in 影视素材 Confident engineer in hard hat walks towards camera clipboard in hand a confident engineer walks towards the camera clipboard in 影视素材
4K Male engineer inspecting solar panels male engineer inspecting solar panels positive adult man in uniform checking photovoltaic 股票视频 Male engineer inspecting solar panels male engineer inspecting solar panels positive adult man in uniform checking photovoltaic 股票视频
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