{HEAD ~ A portable electronic device} includes a main body , {TAIL ~ a cover} , and a battery  
includes
{ HEAD ~ A portable electronic device } includes a main body , { TAIL ~ a cover } , and a battery
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH