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Device for causing breakage of a snow cornice
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AR245818A1
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Process and device for triggering an avalanche
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Method and device for triggering an avalanche
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Method and device for triggering an avalanche
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Multi-hull craft which can be transported by road
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Formwork for prismatic concrete elements
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Method and apparatus for automatically positioning an explosive charge above the surface of snow.
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FR2577876A1
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Support head of a pulley in a cable transportation system
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