{HEAD ~ A further object} of the invention is to provide {TAIL ~ a basement emergency exit} which is essentially flush with a basement wall and is simple and easy to operate to provide a stairway and an automatically opening window 
is to provide
{ HEAD ~ A further object } of the invention is to provide { TAIL ~ a basement emergency exit } which is essentially flush with a basement wall and is simple and easy to operate to provide a stairway and an automatically opening window
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