Also, {HEAD ~ the head pipe} is formed at its front surface or {TAIL ~ its both sides} of its tubular main body portion with an opening in order to reduce the weight 
Also , { HEAD ~ the head pipe } is formed at its front surface or { TAIL ~ its both sides } of its tubular main body portion with an opening in order to reduce the weight
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH