| http://www.w3.org/ns/prov#value | - concrete, asphalt, decomposed granite, paver stones), using steam cleaners, jack hammers, concrete tools, and other hand and power tools as appropriate. ??? Installs, repairs, and maintains various type of irrigation systems (to include drip, overhead, automatic, manual, low voltage controls and valves, etc.) using trenchers, shovels, backhoes, etc. ??? Cleans out drainage ditches, catch basins,
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