A circular saw has a housing enclosing a motor for driving {TAIL ~ an output shaft} about {HEAD ~ an axis} of rotation 
A circular saw has a housing enclosing a motor for driving { TAIL ~ an output shaft } about { HEAD ~ an axis } of rotation
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH