| http://www.w3.org/ns/prov#value | - sm comprising: a roll-up screen mechanism mounted on one of said door cover and housing, said mechanism including a rotatable rod and a screen rolled up on said rod; a latch mounted on one of said housing and door cover; said latch and roll-up screen mechanism being operatively associated whereby when said door cover is moved to said covered position with said screen rolled up, said roll-up screen
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