标题：[求助]这公式的含义是什么？能简化么？

X:=HHV(C,20);
Y:=LLV(C,20);

PARTLINE(((X>=REF(X,20))AND(X>=REF(X,1))AND(X>=REF(X,2))AND(X>=REF(X,3))AND(X>=REF(X,4))AND(X>=REF(X,5))AND(X>=REF(X,6))AND(X>=REF(X,7))AND(X>=REF(X,8))AND(X>=REF(X,9))AND(X>=REF(X,10))AND(X>=REF(X,11))AND(X>=REF(X,12))AND(X>=REF(X,13))AND(X>=REF(X,14))AND(X>=REF(X,15))AND(X>=REF(X,16))AND(X>=REF(X,17))AND(X>=REF(X,18))AND(X>=REF(X,19))),y),COLORFF8000;

PARTLINE((Y<=REF(Y,20))AND(Y<=REF(Y,1))AND(Y<=REF(Y,2))AND(Y<=REF(Y,3))AND(Y<=REF(Y,4))AND(Y<=REF(Y,5))AND(Y<=REF(Y,6))AND(LLV(C,20)<=REF(Y,7))AND(Y<=REF(Y,8))AND(Y<=REF(Y,9))AND(Y<=REF(Y,10))AND(Y<=REF(Y,11))AND(Y<=REF(Y,12))AND(Y<=REF(Y,13))AND(Y<=REF(Y,14))AND(Y<=REF(Y,15))AND(Y<=REF(Y,16))AND(Y<=REF(Y,17))AND(Y<=REF(Y,18))AND(Y<=REF(Y,19)),x),COLOR0080FF;