Various arrangements of {HEAD ~ components} within the device are possible, and elements such as {TAIL ~ filters} can be accommodated 
Various arrangements of { HEAD ~ components } within the device are possible , and elements such as { TAIL ~ filters } can be accommodated
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH