| http://www.w3.org/ns/prov#value | - Among the non-adhesive substances or materials which may be employed in forming the composite bodies are natural fibers, such for example as wood fibers, cotton, flax, jute, sisal, kapok, wool, hair, and silk, other natural substances such as leather and cork; synthetic fibers, for example, cellulosic fibers such as cellulose hydrate, cellulose derivatives such as cellulose esters, mixed cellulose
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