Technotherma India [Pvt] Ltd. Supplies Pit Type Furnace. Technotherma India [Pvt] Ltd. Manufactures various types of heat treatment furnaces, industrial furnaces, and annealing furnaces. The Pit Type Furnace for heat treatment under protective atmosphere. The Pit Type Furnace can be used for annealing, hardening, tempering gas carburizing, nitriding, carbonitriding, normalizing decarb and other heat treatments.