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