This series of pit gas nitriding furnace cycle mode of operation resistance furnace, gas carburizing steel parts used, but also for gas Nitrocarburizing] [soft nitriding treatment. When not in use ammonia and infusion device, can use as a general Pit Furnace. This series of pit gas nitriding furnace cycle mode of operation resistance furnace, gas carburizing steel parts used, but also for gas Nitrocarburizing] [soft nitriding treatment. When not in use ammonia and infusion device, can use as a general Pit Furnace. This series of pit gas nitriding furnace cycle mode of operation resistance furnace, gas carburizing steel parts used, but also for gas Nitrocarburizing] [soft nitriding treatment. When not in use ammonia and infusion device, can use as a general Pit Furnace.