diff --git a/src/Nest/Core/OptimizeMachine.ts b/src/Nest/Core/OptimizeMachine.ts
index c0db7a9ae..298849f44 100644
--- a/src/Nest/Core/OptimizeMachine.ts
+++ b/src/Nest/Core/OptimizeMachine.ts
@@ -56,6 +56,20 @@ export class OptimizeMachine
         //     this.PartCount[part.Id] = count === undefined ? 1 : (count + 1);
         // }
     }
+    PutPreParts(parts: Part[])
+    {
+        if (globalThis.document) parts = parts.slice();
+        arrayRemoveIf(parts, p => p.RotatedStates.length === 0);
+        this.PreParts = parts;
+
+        // //计算重复的零件(暂时不用)
+        // for (let part of parts)
+        // {
+        //     let count = this.PartCount[part.Id];
+        //     this.PartCount[part.Id] = count === undefined ? 1 : (count + 1);
+        // }
+    }
+
 
     callBack: (i: Individual) => Promise<void>;
 
diff --git a/src/Nest/Core/OptimizeWorker.worker.ts b/src/Nest/Core/OptimizeWorker.worker.ts
index d9e0d1f5a..2719c96d3 100644
--- a/src/Nest/Core/OptimizeWorker.worker.ts
+++ b/src/Nest/Core/OptimizeWorker.worker.ts
@@ -16,6 +16,7 @@ ctx.addEventListener("message", async (event) =>
     m.OddmentsBins = db.OddmentsBins;
     m.ComparePointKeys = db.ComparePointKeys;
     m.PutParts(db.Parts);
+    m.PutPreParts(db.PreParts);
 
     m.callBack = async (inv) =>
     {
diff --git a/src/Nest/Test/PlaceUtil.ts b/src/Nest/Test/PlaceUtil.ts
index e95a79998..2bced2cba 100644
--- a/src/Nest/Test/PlaceUtil.ts
+++ b/src/Nest/Test/PlaceUtil.ts
@@ -395,6 +395,7 @@ export async function InitParts(binPath = DefaultBin): Promise<NestDatabase>
     let db = new NestDatabase();
     db.Paths = PathGeneratorSingle.paths;
     db.Parts = parts;
+    db.PreParts = [];
     db.Bin = DefaultBin;
     db.OddmentsBins = oddpaths;
     db.ComparePointKeys = gravity;
diff --git a/src/Nest/Test/TestYH2.tsx b/src/Nest/Test/TestYH2.tsx
index 3c85fc73c..78849a792 100644
--- a/src/Nest/Test/TestYH2.tsx
+++ b/src/Nest/Test/TestYH2.tsx
@@ -15,6 +15,7 @@ export class Command_TestYH2 implements Command
         m.Bin = db.Bin;
         m.OddmentsBins = db.OddmentsBins;
         m.PutParts(db.Parts);
+        m.PutPreParts(db.PreParts);
         m.callBack = async (inv) =>
         {
             Place(inv, db.Parts, db.Bin);