This prevents {TAIL ~ the stage} that changes {HEAD ~ its state} most frequently from being subjected to action more than is physically permitted by the technology used 
This prevents { TAIL ~ the stage } that changes { HEAD ~ its state } most frequently from being subjected to action more than is physically permitted by the technology used
OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH