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Engineers hold solar panels sample for testing efficiency of solar cell panels type in office. Learn design and calculation to energy accumulation, use pure energy nature, solar and wind to output
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Solar panels mounting work ending by professionals workers team. Using special equipment, providing new technologies ecology saving, green energy solution. High-tech exterior,smart building. Ladder.
Car mechanic use voltmeter to check voltage battery low energy problem for car care service maintenance and re charger or jump start or change battery replacement.

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