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