37 [ Repair or maintenance of filtering machines, chemical processing machines and apparatus; Repair or maintenance of non-electric prime movers for non-land vehicles, namely, internal combustion engines, gasoline engines, mufflers for motors and engines, diesel engines, jet engines, turbojet engines, turboprop engines, ramjet engines, turbines, compressed air engines, nuclear prime movers; Repair or maintenance of air cleaner for internal combustion engines, filter used in air cleaner for internal combustion engines, oil filter for internal combustion engines, oil cooler for internal combustion engines, fuel filter for internal combustion engines, fuel tank for internal combustion engines, oil tank for internal combustion engines, steam gasoline adsorption canister for internal combustion engines; Repair and maintenance of parts for non-electric prime movers for land and non-land vehicles, namely, internal combustion engines, gasoline engines, mufflers for motors and engines, diesel engines, jet engines, turbojet engines, turboprop engines, ramjet engines, turbines, compressed air engines, nuclear prime movers, and land vehicles; Repair or maintenance of polymer film for medical apparatus and instruments, filter for medical apparatus and instruments, adsorption filter for diagnostic apparatus and instrument, filters other than pre-mentioned filters for diagnostic apparatus and instrument, namely, filter for sterilizing and disinfection, filter for eliminating the specific constituent such as leukocyte from blood, other medical apparatus and instruments and their parts and fittings, namely, therapeutic apparatus and instruments, therapeutic inhalers, therapeutic oxygen inhalators, defibrillators, pneumothorax apparatus, therapeutic bath apparatus and instruments, dialyzers, sprayers; Repair or maintenance of household air cleaner apparatus and their filters, household ionized alkaline water generated equipment and their filters, household electrothermic appliances; Repair or maintenance of air cleaner apparatus for interior of automobiles, air cleaner apparatus for industrial purposes and their filters, air-conditioning apparatus; Repair or maintenance of household water purifying instrument and their filters; Repair or maintenance of water purifying instrument and their filters for industrial purposes, water purifying apparatus; Repair or maintenance of non-electric prime movers for land vehicles, namely, internal combustion engines, gasoline engines, diesel engines, jet engines, turbojet engines, turboprop engines, ramjet engines, turbines; Repair or maintenance of vessels, namely, cargo ships and boats, passenger ships and boats. fishing boats, naval vessels, cable ships, icebreakers, dredgers, water bikes, tankers, motorboats and their parts and fittings; Repair or maintenance of aircraft and their parts and fittings; Repair or maintenance of railway rolling stock and their parts and fittings; Repair or maintenance of electric and non-electric automobiles and their parts and fittings; Repair or maintenance of two-wheeled motor vehicles, bicycles and their parts and fittings ]