However, this leads to the problem of higher system installation time and {TAIL ~ costs} and larger space requirements of {HEAD ~ overall system} 
However , this leads to the problem of higher system installation time and { TAIL ~ costs } and larger space requirements of { HEAD ~ overall system }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD