| http://www.w3.org/ns/prov#value | - Drive ring 156 may be manufactured from a ceramic, or other similar material, in order to provide for the required friction with motor tip portions 80 while also limiting wear on the tip portions 180.It should be appreciated by those skilled in the art having the benefit of the present disclosure that a piezoelectric harmonic motor, or another type of harmonic motor having no intrinsic magnetic fi
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