| http://www.w3.org/ns/prov#value | - This cushion may be secured to the base plate in a variety of ways 10 and I do not confine myself to any one special manner of attachment. , The intermediate member R of practically the size of the air cushion may be of fabric, leather, or other material, and I prefer to extend it along the inner edge to some extent beyond the substantially alined edges of the base plate and the air cushion to for
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