Hollow pipe, through which water pumping out of town or take out - another tool exporting water, Warfare in the Middle Ages, Water Pumps, above: Pipe device for carrying water away from a moat of a fortress, below: a different instrument for extracting water, woodcut, p. 335, (Liber decimus), 1483, Roberto Valturio: [De re militari]. Verona: [Boninus de Boninis], [1483

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Hollow pipe, through which water pumping out of town or take out - another tool exporting water, Warfare in the Middle Ages, Water Pumps, above: Pipe device for carrying water away from a moat of a fortress, below: a different instrument for extracting water, woodcut, p. 335, (Liber decimus), 1483, Roberto Valturio: [De re militari]. Verona: [Boninus de Boninis], [1483]

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