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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.
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
Electrician house construction worker using voltmeter check electric wire that been prepared and install before assemble light switch for safety working procedure. Industrial safety inspection concept

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