steel structure, bimetal interlayer, with aluminum silicate material to preserve heat Annealers of BTN(X)-YQ series products take natural gas, LPG, city gas and diesel oil as fuel, fully automatic control which are heated air circulation type with net specifications of 1500mm, 1800mm, 2100mm, 2400mm, 2700mm, 3000mm, 3300mm, 3600mm, 4200mm.This furnace mode is all steel structure, bimetal ...