| http://www.w3.org/ns/prov#value | - To prevent you from accidentally operating this, on one side there is a button which needs to be pushed in first which then allows the mechanism to work.With the frame collapsed you merely lie it down on the floor, release the slide mechanism, then lift the handle, as you do so, you push the bar with the front wheels forward with your foot and the frame opens out and the handle clicks into place.C
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