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Construction work for electricity power lines |
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Compressed-air pipeline work |
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Compressed-air pipeline work for mailing system |
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Construction work for communication lines |
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Ancillary works for pipelines and cables |
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Ancillary works for water pipelines |
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Irrigation works |
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Irrigation piping construction work |
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Storm-water piping construction work |
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District-heating mains construction work |
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