For use of {TAIL ~ laser beams} transmitted from {HEAD ~ one unit} of solid laser generating device A1 on the ground, the number of units should be 150 in view of cost performance 
For use of { TAIL ~ laser beams } transmitted from { HEAD ~ one unit } of solid laser generating device A1 on the ground , the number of units should be 150 in view of cost performance
OTH 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 OTH OTH OTH OTH OTH OTH