| http://www.w3.org/ns/prov#value | - In a preferred embodiment, the transverse wall 20 and the upper portion 40A of the lower support wall 40 form one integral component and the base 30 and the lower portion 40B of the lower support wall form another integral component, the two components being joined together by such means as a snap-fit, ultrasonic welding, adhesive, screws, clips or other mechanical fasteners.
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