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  If a single machine gun lighter than two Lewis guns, can give the same power of fire with the same safety of functioning, the constructor can propose its adoption. The unit of comparison adopted is, for the forward guns, the Vickers; for the rear guns, the Lewis.

[[underline]] ARMOR [[/underline]] - The armored seats and removable armor plates should be studied in such a fashion as to obtain the maximum safety without surpassing a weight of 50 kilogrammes per person or per motor.

[[underline]] RADIATORS FOR THE MACHINE-GUNS [[/underline]] - The machine guns intended for firing upon objects on the ground, on the airplanes or types A.2, BS.2 or Bn.2, should be provided with special radiators around the barrel of the gun, permitting it to fire long series of cartridges without risking the deterioration of the gun. 

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