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Safety helmet for motor-cyclists provided with manually-adjustable ventilation means
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METHOD FOR MANUFACTURING HELMETS
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DEVICE FOR ADJUSTING THE OPENING OF VISORS WITH HELMETS FOR MOTORCYCLISTS AND THE LIKE
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DEVICE FOR ADJUSTING THE OPENING OF VISORS FOR HELMETS FOR MOTORCYCLISTS AND THE LIKE
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DEVICE FOR ADJUSTING THE OPENING OF VISORS FOR HELMETS FOR MOTORCYCLISTS AND THE LIKE
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Device for adjusting the opening of visors, in particular of integral crash-helmets and the like
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