diff --git a/Cad/BlockRawFreeForgeNoRoundHeadDrawer.cs b/Cad/BlockRawFreeForgeNoRoundHeadDrawer.cs
index a490173..6d31b70 100644
--- a/Cad/BlockRawFreeForgeNoRoundHeadDrawer.cs
+++ b/Cad/BlockRawFreeForgeNoRoundHeadDrawer.cs
@@ -147,14 +147,14 @@ namespace CadParamPluging.Cad
 
             // 绘制左侧框线（连接左端圆弧和中间剖面框）
             // 用户需求：
-            // 1. 去掉最外侧的圆角 -> filletR 传入 0 
+            // 1. 去掉最外侧的圆角 -> filletR 传入 innerFilletR (Updated per requirement)
             // 2. 横向闭合：水平线需延伸到中间框圆角结束的地方 (xSectionLeft + innerFilletR) 以实现无缝连接
-            // 3. 竖向不闭合：DrawBoxSideFrame 内部不 Closed，且不画连接处的竖线
-            DrawBoxSideFrame(ctx, xInnerLeft, xSectionLeft + innerFilletR, oy, H, 0, isLeft: true);
+            // 3. 竖向不闭合：DrawBoxSideFrame 内部不 Closed，且不画连接处的竖线 (Now Closed=true in Helper)
+            DrawBoxSideFrame(ctx, xInnerLeft, xSectionLeft + innerFilletR, oy, H, innerFilletR, isLeft: true);
 
             // 绘制右侧框线
             // 类似的，水平线起点延伸到 (xSectionRight - innerFilletR)
-            DrawBoxSideFrame(ctx, xSectionRight - innerFilletR, xInnerRight, oy, H, 0, isLeft: false);
+            DrawBoxSideFrame(ctx, xSectionRight - innerFilletR, xInnerRight, oy, H, innerFilletR, isLeft: false);
 
             // 3. 剖面填充 - 只在中间区域
             if (innerFilletR > 0.01)
@@ -242,7 +242,8 @@ namespace CadParamPluging.Cad
                 double xOuterRight = ox + visualTotalW;
                 
                 // 修正：由于去掉了最外侧圆角，标注界线起点直接对齐最外侧边界
-                double xDimOrigin = xOuterRight;
+                // Refinment: 减去倒角半径，使尺寸界线能够接触到直边，避免因为圆角产生悬空
+                double xDimOrigin = xOuterRight - innerFilletR;
 
                 AddLinearDim(
                     ctx,