{HEAD ~ The total content} of {TAIL ~ these additional alloying elements} should not exceed 1.0 percent by weight, preferably not over 0.5 percent by weight 
{ HEAD ~ The total content } of { TAIL ~ these additional alloying elements } should not exceed 1.0 percent by weight , preferably not over 0.5 percent by weight
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH