The apparatus has the attributes of being of {HEAD ~ a reduced size} and {TAIL ~ simplified operation}, and is inexpensive to manufacture compared to other purification systems 
The apparatus has the attributes of being of { HEAD ~ a reduced size } and { TAIL ~ simplified operation } , and is inexpensive to manufacture compared to other purification systems
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH