By adjusting {HEAD ~ the shape} of the shutter 69, location of a cut off line of {TAIL ~ the light distribution pattern} can be adjusted 
By adjusting { HEAD ~ the shape } of the shutter 69 , location of a cut off line of { TAIL ~ the light distribution pattern } can be adjusted
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH