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technology
Flat
Constructions
Connection, Socket, plug
DarkGray
512x512
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electronics, Measuring, Voltmeter
SandyBrown
electricity, illumination, technology
Light bulb, Idea, electricity
Black
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power, industry, technology
Light bulb, Idea, invention
Idea, electricity, illumination
invention, electricity, illumination
Gainsboro
Light bulb, electronics, invention
Energy, power, industry
Energy, power, technology
mill, ecology, Ecological
Drill, Construction, technology
Drill, Improvement, Drilling Machine
Drilling, Improvement, Drilling Machine
