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Ouvrage de SainteAgnes closeup of chadburn. en Chadburn for shoots ordering inside the maginot fort of SainteAgns AlpesMaritimes France The chadburn was used to give precise orders and receive acknowledges in very noisy environement fr Chadburn de conduite de tir de l'ouvrage de SainteAgns AlpesMaritimes Le chadburn tait utilis pour