For example, Japanese patent abstract JP 53152662 shows one arrangement for drilling {HEAD ~ microscopic holes} using {TAIL ~ a multi frequency deflector} having selectable frequencies f1 . .  
using
For example , Japanese patent abstract JP 53152662 shows one arrangement for drilling { HEAD ~ microscopic holes } using { TAIL ~ a multi frequency deflector } having selectable frequencies f1 . .
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH