The angle of bending refers to an angle formed by the longitudinal direction and a line that joins {HEAD ~ the center} of {TAIL ~ that slot transmission aperture} and the short side 
The angle of bending refers to an angle formed by the longitudinal direction and a line that joins { HEAD ~ the center } of { TAIL ~ that slot transmission aperture } and the short side
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH