In {TAIL ~ a preferred embodiment} of the invention, {HEAD ~ the technique} is employed to assemble a scan optics module and a scanner body in a laser scanner 
In { TAIL ~ a preferred embodiment } of the invention , { HEAD ~ the technique } is employed to assemble a scan optics module and a scanner body in a laser scanner
REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH