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DE4310524A1
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Buffer element for air-duct lines
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DE4117446A1
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Connectors for flexible ventilator ducts in mine - consist of basic sheet brought into shape by rings and frustum-shaped end rings
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DE3301019A1
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Continuous-airduct storage unit
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DE3301021A1
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Device for storing airducts with mounting for a measuring instrument
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DE2802399A1
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FLEXIBLE WEATHER LOVE
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DE2802400A1
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Mine ventilation system with flexible ducts - uses impregnated woven material, with ends secured by longitudinal support strips
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DE2718186A1
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WEATHER LIGHTING FOR MOUNTAIN AND TUNNELING
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DE2517060A1
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Mine roof cavity packing - has inflatable container with deformable inner pad inserted and pumped into cavity wall contact
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DE1948278A1
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Refuge tent for shotfirers
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