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| navigate by keyword : abstract assemble background battery close closeup conduit duct engineer factory flap gate hand heat heating holding industrial industry line open pipe pipeline pipework piping plant plumber plumbing power system technic turn turning valve vavle vent water worker working |
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| Worker open a valve of pipeline close up background |
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Stockphotos.ro (c) 2025. All stock photos are provided by Dreamstime and are copyrighted by their respective owners. |
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