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Pit-type heating furnace:
for stress relief of shafts or roller parts while tempering or aging at low temperature;
Pit-type nitriding furnace:
for vacuumizing gas permeation of main shafts of machine tools, crankshafts of internal-combustion engines, moulds, high precise gears etc.; for stress relief while tempering or aging;
Pit-type nitriding carburizing furnace:
for carburization of carbon steel and low carbon alloy steel;
As periodic continuous furnace, pit-type furnace is featured in even furnace temperature, low product deformation, high tightness of furnace body, high safety and reliability, good thermal insulation of furnace body, saving energy, no pollution, good environmental protection benefit etc.