The preprogrammable memory may be programmed for each time of {TAIL ~ image storage}, or may be programmed only for the times of storage in the first image memory and a time delay factor for {HEAD ~ storage} in the second image memory relative to the times of storage in the first image memory 
The preprogrammable memory may be programmed for each time of { TAIL ~ image storage } , or may be programmed only for the times of storage in the first image memory and a time delay factor for { HEAD ~ storage } in the second image memory relative to the times of storage in the first image memory
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH