| http://www.w3.org/ns/prov#value | - Further, chemical modification, by etherification and esterification, of the wood hydroxyl group, causes no change in diaphragm size, enables the diaphragm to have superior acoustic frequency characteristics, and lessharmonic wave distortion, as compared to flat honeycomb constructed diaphragms, whose core materials are light metals such as aluminum or FRPs.
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