| http://www.w3.org/ns/prov#value | - r to the bed presents actuator means on its outwardly facing face for actuating the locking and unlocking means and positioned in such a manner as to be accessible only when said elements are in the overlapping position; and [0040] the number of elements is equal to three, the second element being hollow and serving as a housing for an additional element which is designed to slide. [0041] Other ch
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