{TAIL ~ The tilt angle} may be, for example, up to {HEAD ~ about 45°} 
{ TAIL ~ The tilt angle } may be , for example , up to { HEAD ~ about 45 ° }
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD