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