In the piezoelectric resonator element, the resonating arm includes an adjusting part adjusting {HEAD ~ rigidity} with {TAIL ~ respect} to a bend in a third direction that is orthogonal to the first and second directions 
with
In the piezoelectric resonator element , the resonating arm includes an adjusting part adjusting { HEAD ~ rigidity } with { TAIL ~ respect } to a bend in a third direction that is orthogonal to the first and second directions
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH