Since the bearing capacity of {HEAD ~ such bearing portions} increases with increase of the rotary speed of the device, the applicable range of {TAIL ~ revolutions} per minute can be increased by the application of the invention 
Since the bearing capacity of { HEAD ~ such bearing portions } increases with increase of the rotary speed of the device , the applicable range of { TAIL ~ revolutions } per minute can be increased by the application of the invention
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH