From the foregoing, it will be apparent that {HEAD ~ the present invention} brings to {TAIL ~ the art} 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 
From the foregoing , it will be apparent that { HEAD ~ the present invention } brings to { TAIL ~ the art } 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
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