7 GRINDING MACHINES AND GRINDING MILLS FOR USE IN GRINDING AND PULVERIZING SOLIDS, NAMELY, STUMPS, CONTAMINATED WOOD WASTE, LOGS, LOG YARD DEBRIS, MILL WASTE, DEMOLITION DEBRIS, PALLETS, PILINGS, RAILROAD TIES, WET STRINGY BARK, PAPER, PLASTIC, TIRES, OTHER WASTE PRODUCTS, NAMELY, MUNICIPAL SOLID WASTE AND ENVIRONMENTAL WASTE