From the foregoing, it will be apparent that the present invention brings to {TAIL ~ the art} {HEAD ~ a new and improved drill} 10 with body 13 with length L which is at least four times the diameter D of tip end portion 14 
to
From the foregoing , it will be apparent that the present invention brings to { TAIL ~ the art } { HEAD ~ a new and improved drill } 10 with body 13 with length L which is at least four times the diameter D of tip end portion 14
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH