For example, elements could be attached by {HEAD ~ means} other than screws in {TAIL ~ some cases} 
For example , elements could be attached by { HEAD ~ means } other than screws in { TAIL ~ some cases }
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL