According to {TAIL ~ an optional embodiment}, {HEAD ~ the cap} 1 may be formed by molding as a single piece 
According to
According to { TAIL ~ an optional embodiment } , { HEAD ~ the cap } 1 may be formed by molding as a single piece
REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH