4631001 Furnaces, automatic, metal heat treatment 4631003 Furnaces, austempering 4631004 Furnaces, continuous, metal heat treatment 4631005 Furnaces, continuous, for heat treatment of metal sheets or plates 4631006 Furnaces, continuous, for heat treatment of metal strip or wire 4631007 Furnaces, bell, metal heat treatment 4631008 Furnaces, controlled atmosphere, metal heat treatment 4631009 Furnaces, forced air circulation, metal heat treatment 4631010 Furnaces, malleablising 4631011 Furnaces, vacuum, metal heat treatment 4631012 Furnaces, shaft and gun barrel heat treatment 4631013 Furnaces, walking beam, metal heat treatment 4631014 Furnaces, chain hearth, metal heat treatment 4631015 Furnaces, pusher hearth, metal heat treatment 4631016 Furnaces, roller hearth, metal heat treatment 4631017 Furnaces, rotary hearth, metal heat treatment 4631018 Furnaces, shaker hearth, metal heat treatment 4631019 Furnaces, wire hearth, metal heat treatment 4631020 Furnaces, induction, metal heat treatment 4631021 Furnaces, induction, coreless, metal heat treatment 4631022 Furnaces, induction, billet heating 4631023 Furnaces, induction hardening 4631024 Furnaces, resistance, metal heat treatment 4631025 Furnaces, resistance, high vacuum, metal heat treatment 4631026 Furnaces, radiant, metal heat treatment 4631027 Furnaces, radiant tube fired, metal heat treatment 4631028 Furnaces, rapid heating, gas fired, metal heat treatment 4631029 Furnaces, immersion heater, metal heat treatment 4631030 Furnaces, reverberatory, metal heat treatment 4631031 Furnaces, bath, ferrous metal heat treatment 4631032 Furnaces, lead bath, metal heat treatment 4631033 Furnaces, salt bath, metal heat treatment 4631034 Furnaces, muffle, metal heat treatment 4631035 Furnaces, fluidised bed, metal heat treatment 4631036 Furnaces, electric, metal die heat treatment 4631037 Furnaces, preheating, for metals 4631038 Furnaces, re-heating, for metals 4631039 Furnaces, re-heating, billet and bar 4631040 Furnaces, re-heating, heavy forging 4631041 Furnaces, re-heating, ingot, pit 4631042 Furnaces for brazing, welding and sintering 4631043 Furnaces for aluminium and aluminium alloy heat treatment 4631044 Furnaces, steel and ferrous alloy hardening and tempering 4631045 Furnaces, flame hardening 4631046 Furnaces, nitriding 4631047 Furnaces, case hardening 4631048 Furnaces, annealing, normalising and stress relieving 4631049 Furnaces, tempering and annealing, for wire drawing 4631050 Furnaces, investment casting 4631051 Furnaces, heating, forging and hot pressing 4631052 Furnaces, rivet heating 4631053 Furnaces, welding rod heating 4631054 Vessels, trays and carriers for metal heat treatment furnaces 4631055 Chargers and dischargers for metal re-heating furnaces
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