If {TAIL ~ such piezoelectric resonator element} is excited to perform flexural vibration by the excitation electrode, the vibration includes not only a component in a predetermined vibrating direction but also a component of {HEAD ~ vibration} in a direction that is orthogonal to the predetermined vibrating direction 
If { TAIL ~ such piezoelectric resonator element } is excited to perform flexural vibration by the excitation electrode , the vibration includes not only a component in a predetermined vibrating direction but also a component of { HEAD ~ vibration } in a direction that is orthogonal to the predetermined vibrating direction
OTH TAIL TAIL TAIL 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 OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH