Freezing machines and apparatus; Cooking equipment for industrial purposes; Frozen food thawing apparatus for industrial purposes; Water pollution control equipment; Water sterilizers; Pure water production systems; Apparatus for removing dissolved gases from liquids; Sterilizing and water purifying apparatus for water pollution control through use of ultraviolet rays; Sterilizing and water purifying apparatus for water pollution control used for purification of industrial water and drinking water and sewage purification of domestic waste water and industrial waste water through use of ultraviolet rays; Refrigerating apparatus and machines; Vacuum thawing apparatus; Steam generating facilities; Electric demineralizers used for purification of industrial water and drinking water and sewage purification of domestic waste water and industrial waste water; Water treatment equipment, including ballast water management system; Chemicals feeder; Steam generating apparatus
Environmental Control ApparatusConstruction; Repair or maintenance of apparatus and column for chromatography; Repair or maintenance of freezing machines and apparatus; Repair or maintenance of cooking equipment for industrial purposes; Repair or maintenance of frozen food thawing apparatus for industrial purposes; Repair or maintenance of water pollution control equipment; Repair or maintenance of water sterilizers; Repair or maintenance of pure water production systems; Repair or maintenance of apparatus for removing dissolved gases from liquids; Repair or maintenance of sterilizing and water purifying apparatus for water pollution control through use of ultraviolet rays; Repair or maintenance of sterilizing and water purifying apparatus for water pollution control used for purification of industrial water and drinking water and sewage purification of domestic waste water and industrial waste water through use of ultraviolet rays; Repair or maintenance of cooling equipment; Repair or maintenance of vacuum thawing apparatus; Repair or maintenance of steam generating facilities; Repair or maintenance of electric demineralizers used for purification of industrial water and drinking water and sewage purification of domestic waste water and industrial waste water; Repair or maintenance of water treatment equipment, including ballast water management system; Repair or maintenance of chemicals feeder; Repair or maintenance of apparatus for testing water quality; Repair or maintenance of apparatus for measuring water quality; Repair or maintenance of apparatus for analyzing water quality; Repair or maintenance of steam generating apparatus
Building Construction and Repair