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Adjustable cam having readily detachable indexing means
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Bag-type gaseous fluid filter having enlarged filtering surfaces
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Bag-type air filter
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Control apparatus for advancing web of filter medium through a filtering zone
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Control apparatus for advancing web of filter medium through a filtering zone
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Indefinite length filter means with programming means
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Filter for gaseous fluids
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Multi-pleated air filter
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Air and gas filter having automatically controlled movement of filter curtain
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Air filter
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Air cleaner
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Air filter media
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