3、 If K<590:Then15.31-0.0246*Abs(590-K)-(55.5-Abs(590-K))2÷5000→ZElse If K<645.5:Then15.31-0.0198*Abs(590-K)-(55.5-Abs(590-K))2÷5000→ZElseIfK<726.53:Then15.31-0.0198*Abs(590-K)→ZElseIfK<770:Then11.746+0.0198*Abs(770-K)+(43.47-Abs(770-K))2÷5400→ZElse If K<813.47:Then个人收集整理勿做商业用途11.746+0.012