According to the above configuration, since {TAIL ~ a hollow part} is formed in the rotating shaft, the weight of {HEAD ~ the rotor} can be reduced with hardly any decrease in the natural frequency of the rotor 
According to the above configuration , since { TAIL ~ a hollow part } is formed in the rotating shaft , the weight of { HEAD ~ the rotor } can be reduced with hardly any decrease in the natural frequency of the rotor
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH