Force combination was added

Infrastructure/UI/Converters/Units/Curvature.cs

@@ -0,0 +1,17 @@
+using StructureHelperCommon.Infrastructures.Enums;
+using StructureHelperCommon.Services.Units;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StructureHelper.Infrastructure.UI.Converters.Units
+{
+    internal class Curvature : UnitBase
+    {
+        public override UnitTypes unitType { get => UnitTypes.Curvature; }
+        public override IUnit currentUnit { get => CommonOperation.GetUnit(unitType, "1/mm"); }
+        public override string unitName { get => "Curvature"; }
+    }
+}