| http://www.w3.org/ns/prov#value | - The angle plates 10 and 11 are formed from any suitable substantially rigid material, such as sheet metal, to a size and in a strength appropriate to meet the use requirements in contemplation, and in constructions adapted for coaction with rims of conventional bathtubs it has been found to be practical to provide said plates in a width parallel to the line of the angle bend somewhat greater than
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