As explained below, such an arrangement facilitates performing alignment and height setting {HEAD ~ operations} at {TAIL ~ widely spaced blade height positions} to increase the accuracy of those procedures 
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As explained below , such an arrangement facilitates performing alignment and height setting { HEAD ~ operations } at { TAIL ~ widely spaced blade height positions } to increase the accuracy of those procedures
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH