In the practice, in most applications, said {TAIL ~ frontal plane} of {HEAD ~ the store} is vertical, and said generatrixes and axis are vertical too 
In the practice , in most applications , said { TAIL ~ frontal plane } of { HEAD ~ the store } is vertical , and said generatrixes and axis are vertical too
OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH