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DE1245325B
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Device for separating dust contained in the air
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DE824878C
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Dust collector
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DE722808C
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Filter plate
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DE719188C
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Filter plate
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DE696579C
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Process for the production of grid plates for the filtration of gases and air
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DE697016C
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Cyclonic centrifugal dust separator
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DE691870C
|
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Filters for purifying air
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DE669382C
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Dry filter for air, gases and steam
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DE646508C
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Air filter made of helically wound metal bands
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DE335960C
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Fuel valve control on combustion engines
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DE656099C
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Filters for gaseous substances
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