A slide member includes {HEAD ~ a surface layer} having {TAIL ~ a slide surface} for a mating member 
having
A slide member includes { HEAD ~ a surface layer } having { TAIL ~ a slide surface } for a mating member
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH