| http://www.w3.org/ns/prov#value | - The thermo-setting plastics are based on phenol (derived from coal tar), formaldehyde (from carbon monoxide and hydrogen) and urea (from ammonia and carbon dioxide); they are used for such things as door knobs, laminated sheets, plastic crockery, electrical insulators, table-tops, etc., in paint manufacture and as a bonding material in plywood and furniture.
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