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