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