Human bone has been utilized for inventing and developing medical instruments, such as dissection drill, {TAIL ~ endoscope} and {HEAD ~ operation navigator system} 
Human bone has been utilized for inventing and developing medical instruments , such as dissection drill , { TAIL ~ endoscope } and { HEAD ~ operation navigator system }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD