#sheet-metal_work__sheetmetalwork  the craft of doing sheet metal work (as in ventilation systems)
  supertype:  trade.line_of_work__craft  the skilled practice of a practical occupation; "he learned his trade as an apprentice"
  part of:  construction.business_enterprise__building  the commercial activity involved in constructing buildings; "their main business is home construction"; "workers in the building trades"

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