7 Construction equipment powered by renewable energy sources, namely, compaction equipment in the nature of rammers, compactors, and rollers, water pumps for use in agriculture, irrigation, and construction, concrete mixers, plaster mixers, mortar mixers, vibratory screeds, power-operated trowels, concrete vibrators, concrete pumps, and motorized buggies for transporting concrete and for transporting concrete mixing and concrete finishing materials.