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Safety edge for a door
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High sensitivity mat switch
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Hollow non-occluding pressure sensor
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Electric mat switch
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Self-sealing valved bag
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Valved bag with sealing flap
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Self-sealing valved bag
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Valved bag
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Door edge for attachment to a train door and the like
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Pressure sensitive door edge switch
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Microfiche storage device
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Door edge for attachment to a train door and the like
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Elongate switch construction
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Pressure switch
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Microfiche storage device
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