| http://www.w3.org/ns/prov#value | - An interlocking assembly for adjustably mounting a display unit on a fixed structure; said assembly including a hemispherical portion being adapted for mounting to the underside of said display unit, and a concave portion mating with said hemispherical portion and being adapted for mounting on said fixed structure; one of said hemispherical portion and said concave portion having defined therein a
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