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