Communist Cuba:Electricity measurement devices or meters in multiple house building. These meters are placed at one place and they accurately measure...家庭生活, 古巴
Photo taken at the jubilee exhibition of the invention of the Thermionic Valve held at University College, of a Fleming-Gimingham dynanometer...
professional maintenance team analyzing solar power infrastructure with computer and device. - 電壓表 個照片及圖片檔
Voltmeters on display at Electronics Pavilion 33 Milan , April 14th, 1973 - Approval required for all non-editorial uses, No release for...
male technician in protective workwear performing analysis of solar panel system on a house rooftop - 電壓表 個照片及圖片檔
mechanic checking the performance of a solar station on a domestic house roof - 電壓表 個照片及圖片檔建築業, 建築物外觀, 屋頂
two professional electrical engineers in safety uniforms discussing and planning maintenance in front of an mdb control panel. technicians strategizing a repair schedule inside an industrial power distribution room. - 電壓表 個照片及圖片檔
two professional electrical engineers in safety uniforms checking switch using a digital tablet to monitor real-time currents in an mdb room. technicians discussing maintenance while inspecting an industrial power room. - 電壓表 個照片及圖片檔圍起來的, 工業
a senior electrical engineer in safety gear explaining wiring circuits and control panel systems to a colleague in an mdb room. professional technicians using a digital tablet for industrial power plant maintenance. - 電壓表 個照片及圖片檔
rear view of two electrical engineers in safety gear inspecting current and breaker loads on a control panel monitor. technicians discussing power distribution systems and energy data inside an industrial mdb room. - 電壓表 個照片及圖片檔
an electrical engineer using a digital tablet to monitor real-time data and electrical loads at a control panel in an mdb room. professional technician inspecting power distribution systems in an industrial plant. - 電壓表 個照片及圖片檔
senior electrical engineer in a safety uniform training a colleague in an mdb room. professional technicians inspecting control panels and discussing maintenance procedures in an industrial power distribution room. - 電壓表 個照片及圖片檔
two electrical engineers adjusting control panel parameters while comparing real-time data on a digital tablet. professional technicians monitoring power distribution and industrial systems inside a modern switchgear room. - 電壓表 個照片及圖片檔
a professional maintenance engineer in a safety uniform checking electrical currents in an mdb room. technician performing annual preventive maintenance and inspecting control panels in a power distribution room. - 電壓表 個照片及圖片檔
technical drawings and diagrams from 19th century engineering magazine, electricity meter - 電壓表 幅插畫檔、美工圖案、卡通及圖標
technical drawings and diagrams from 19th century engineering magazine, electricity meter - 電壓表 幅插畫檔、美工圖案、卡通及圖標
old engraved illustration of cross-sections and diagrams of various measuring devices (voltmeter, wattmeter) - 電壓表 個照片及圖片檔
physics hand drawn line icons set showing atoms, vectors, forces, energy, motion, magnetism, electricity, measurement tools and waves for science education and modern interface design, editable stroke - 電壓表 幅插畫檔、美工圖案、卡通及圖標