It may be preferential that electrical conductors and {HEAD ~ other elements} passing through {TAIL ~ a portion} of a hollow interior of the tubular body have a combined cross sectional area that is less than 40% of the cross sectional area of the hollow interior of the tubular body to reduce flow impedance 
passing through
It may be preferential that electrical conductors and { HEAD ~ other elements } passing through { TAIL ~ a portion } of a hollow interior of the tubular body have a combined cross sectional area that is less than 40 % of the cross sectional area of the hollow interior of the tubular body to reduce flow impedance
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH