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