diff --git a/ZCppMain/ZtCObjList.H b/ZCppMain/ZtCObjList.H
index 08d1948..c1a0654 100644
--- a/ZCppMain/ZtCObjList.H
+++ b/ZCppMain/ZtCObjList.H
@@ -3193,6 +3193,8 @@ namespace ZNsMain
     class ZtCObjUnitList ///////////////////////////////////////////////////
     {
     public :
+        class ZCLinkUnit; typedef ZCLinkUnit TypeUnit;
+    public :
         typedef TTypeObjUnitList TypeObjUnitList;
     public :
         enum{ZEArrSize    =TypeObjUnitList::ZEArrSize   };
@@ -3203,8 +3205,11 @@ namespace ZNsMain
         typedef typename TypeObjUnitList::TypeSize  TypeSize ;
         typedef typename TypeObjUnitList::TypeAlloc TypeAlloc;
     public :
-        typedef TypeData TypeArr[ZEArrSize];
-        typedef TypeData ZCLink            ; // 이 typedef 에 주의.
+        typedef TypeData TypeArr[ZEArrSize] ;
+    public :
+        typedef const TypeUnit TypeUnitC    ;
+        typedef const TypeData TypeDataC    ;
+        typedef const TypeArr  TypeArrC     ;
     public :
 
 
@@ -3213,10 +3218,10 @@ namespace ZNsMain
         public :
             friend class ZtCObjUnitList;
         private:
-            TypeArr     mo_TypeArr ;
-            TypeSize    ml_UseSize ;
-            ZCLinkUnit* mp_NextUnit;
-            ZCLinkUnit* mp_PrevUnit;
+            TypeArr   mo_TypeArr ;
+            TypeSize  ml_UseSize ;
+            TypeUnit* mp_NextUnit;
+            TypeUnit* mp_PrevUnit;
         private:
 
             static void JoinLink(ZCLinkUnit* lhs, ZCLinkUnit* rhs)
@@ -3239,7 +3244,8 @@ namespace ZNsMain
             }/*
             TypeData& AddEmptyObj()*/
 
-      /*private:*/
+        private:
+        /********************************************************************/
         public :
 
             ZCLinkUnit()
@@ -3276,28 +3282,29 @@ namespace ZNsMain
             }/*
             ZCLinkUnit& operator=(const ZCLinkUnit& rhs)*/
 
-            TypeData*   GetHeadObjPtr (){return mo_TypeArr ;}
-            ZCLinkUnit* GetNextUnitPtr(){return mp_NextUnit;}
-            ZCLinkUnit* GetPrevUniPtr (){return mp_PrevUnit;}
+            TypeSize   size          () const{return ml_UseSize ;}
+            TypeSize   GetUseSize    () const{return ml_UseSize ;}
 
-            TypeSize          size          () const{return ml_UseSize ;}
-            TypeSize          GetUseSize    () const{return ml_UseSize ;}
-            const TypeData*   GetHeadObjPtr () const{return mo_TypeArr ;}
-            const ZCLinkUnit* GetNextUnitPtr() const{return mp_NextUnit;}
-            const ZCLinkUnit* GetPrevUniPtr () const{return mp_PrevUnit;}
+            TypeData * GetHeadObjPtr ()      {return mo_TypeArr ;}
+            TypeUnit * GetNextUnitPtr()      {return mp_NextUnit;}
+            TypeUnit * GetPrevUniPtr ()      {return mp_PrevUnit;}
 
-            TypeData& GetData   (TypeSize AI_Index)
+            TypeDataC* GetHeadObjPtr () const{return mo_TypeArr ;}
+            TypeUnitC* GetNextUnitPtr() const{return mp_NextUnit;}
+            TypeUnitC* GetPrevUniPtr () const{return mp_PrevUnit;}
+
+            TypeData & GetData   (TypeSize AI_Index)
                 { return mo_TypeArr[AI_Index-1]; } // AI_Index start from 1
-            TypeData& operator[](TypeSize AI_Index)
-                { return mo_TypeArr[AI_Index  ]; }
-
-            const TypeData& GetData   (TypeSize AI_Index) const // AI_Index start from 1
+            TypeDataC& GetData   (TypeSize AI_Index) const
                 { return mo_TypeArr[AI_Index-1]; }
-            const TypeData& operator[](TypeSize AI_Index) const
+
+            TypeData & operator[](TypeSize AI_Index)
+                { return mo_TypeArr[AI_Index  ]; }
+            TypeDataC& operator[](TypeSize AI_Index) const
                 { return mo_TypeArr[AI_Index  ]; }
 
-                  TypeArr&  operator*()      { return mo_TypeArr; }
-            const TypeArr&  operator*() const{ return mo_TypeArr; }
+            TypeArr  & operator*()      { return mo_TypeArr; }
+            TypeArrC & operator*() const{ return mo_TypeArr; }
 
 
             bool AddObj(TypeArg AR_Object)