Therefore, according to the first aspect, striking the balance between the rigidities with respect to the flexural vibration can reduce a component of vibration in {HEAD ~ a direction} that is orthogonal to {TAIL ~ the direction} of the flexural vibration of the resonating arm 
Therefore , according to the first aspect , striking the balance between the rigidities with respect to the flexural vibration can reduce a component of vibration in { HEAD ~ a direction } that is orthogonal to { TAIL ~ the direction } of the flexural vibration of the resonating arm
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 OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH