In one embodiment, the exposure period of laser 177 is set by observing the physical effects of {HEAD ~ the infrared light} on {TAIL ~ a test suspension} 14 
In one embodiment , the exposure period of laser 177 is set by observing the physical effects of { HEAD ~ the infrared light } on { TAIL ~ a test suspension } 14
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH