{HEAD ~ A further object} of {TAIL ~ the invention} is to provide 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 
of
{ HEAD ~ A further object } of { TAIL ~ the invention } is to provide 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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