| http://www.w3.org/ns/prov#value | - Due to their structure and larger dimensions, it would not have been possible to integrate them into a useful unit for practical use.There are still further arguments that speak for the use of piezos: Since the motion is based on crystalline solid-state effects, there is no danger of abrasion with this technology and there are no cogwheels, bearings or other mechanical parts subject to wear.This m
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