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