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