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