In the piezoelectric resonator element composed of a piezoelectric plate, rigidities with respect to a bending stress and the like on faces are sometimes different from each other due to {HEAD ~ the anisotropy} of {TAIL ~ the plate} 
of
In the piezoelectric resonator element composed of a piezoelectric plate , rigidities with respect to a bending stress and the like on faces are sometimes different from each other due to { HEAD ~ the anisotropy } of { TAIL ~ the plate }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL