A coolant sprayer may be included to provide flow of a coolant onto {HEAD ~ the coring bit} to cool {TAIL ~ the coring bit} during operation 
A coolant sprayer may be included to provide flow of a coolant onto { HEAD ~ the coring bit } to cool { TAIL ~ the coring bit } during operation
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH