These openings can be holes or small bores extending from the top surface through {TAIL ~ the bottom surface} of {HEAD ~ the base member} 
These openings can be holes or small bores extending from the top surface through { TAIL ~ the bottom surface } of { HEAD ~ the base member }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD