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Plumber install a boiler. Professional engineer installing gas boiler at home and checking the connections and pipes of the domestic heating system. Boiler installation service
An electrician installs a chandelier on the ceiling. Hands of an electrician installing and connecting a lamp to a ceiling.
Worker Technicians are working to construct solar panels system on roof. Installing solar photovoltaic panel system. Men technicians walking on roof structure to check photovoltaic solar modules.
Male professional engineer installing solar photovoltaic panel system, Electrician, worker mounting blue solar module technology on power industrial factory roof, Alternative energy, renewable energy.

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