| http://www.w3.org/ns/prov#value | - DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring now to the drawings in detail and in particular to FIGS. 1 to 3 inclusive, a preferred form of a warning device constructed in accordance with the principles of the present invention is designated in its entirety by reference numeral 10 and is comprised of an elongated sheet like rectangularly shaped member 11 having a light reflecting top surface
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