| http://www.w3.org/ns/prov#value | - Although an epoxy resin is an example of the adhesive agent 81, any of plastic adhesive agents including acrylic resins may be used for the purpose. [0041] The fillers 82 have a size such that they can be interposed between each piezoelectric ceramic element 40 and the actuator base 25 to secure a clearance for electrical insulation between the two.
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