| http://www.w3.org/ns/prov#value | - p.2 are each a divalent aromatic hydrocarbon residue; .lambda. is an integer of 0 or more; m is an integer of 1 or more; nis an integer of 2 or more.DETAILED DESCRIPTION OF THE INVENTIONThe present invention will be described in detail hereinunder.The hole transporting material as referred to herein indicates a material capable of mainly holes alone.
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