workers and engineers are talking about installing solar panel system technician installs panels the roof |
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| navigate by keyword : electricity hardhat horizontal installing copy space repairing efficiency electrician helmet males manager men occupation service technician people alternative australia cooperation development eco ecological economy engineering expertise females generation grid heat innovation learning panel photovoltaic power renewable residence safety solar sunbeam sustainable system teaching turbine two warm working conversion convert energy workers engineers talking installs panels roof |
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| Workers and engineers are talking about installing a solar panel system. Solar panel technician installs solar panels on the roof. alternative energy concepts |
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