{HEAD ~ The tool} may be shifted in {TAIL ~ different positions} and orientations effective to provide an efficient cleaning action on the article to be cleaned 
{ HEAD ~ The tool } may be shifted in { TAIL ~ different positions } and orientations effective to provide an efficient cleaning action on the article to be cleaned
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH