{HEAD ~ The manifold} 46 may be made from aluminum, stainless steel, or {TAIL ~ other appropriate materials} 
{ HEAD ~ The manifold } 46 may be made from aluminum , stainless steel , or { TAIL ~ other appropriate materials }
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL REL OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL