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