DOOR BOTTOM AIR-TIGHT DEVICE
PROBLEM TO BE SOLVED: To provide a door bottom airtight device for lowering a seal member so as to fill a clearance between a lower portion of a door and a floor surface when the door is in a closed position, the door bottom airtight device being configured to be easy in timing for raising and lower...
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Format: | Patent |
Sprache: | eng ; jpn |
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