| http://www.w3.org/ns/prov#value | - In a mattress defining a first, lower chamber for water and a second, upper chamber for air, the improvement comprising,an apparatus for filling and exhausting air from said upper chamber, said apparatus including a housing, a pair of motor and blower assemblies disposed in opposed juxtaposition within said housing, control means for alternately and exclusively energizing one of said pair of motor
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