diff --git a/tests/routes/hicad-manufacturing-extension.test.ts b/tests/routes/hicad-manufacturing-extension.test.ts
index d4f850a28..5e0ec8271 100644
--- a/tests/routes/hicad-manufacturing-extension.test.ts
+++ b/tests/routes/hicad-manufacturing-extension.test.ts
@@ -5,6 +5,8 @@ import {
   buildExplodeOffsets,
   createBomCsv,
   createEngineeringSheetHtml,
+  createSnapshotDataUrl,
+  filterManufacturingBodies,
   groupBodiesIntoBom,
   type BodyMeasurement,
 } from '../../vendor/zoo-modeling-app/manufacturing'
@@ -117,6 +119,48 @@ test.describe('HiCAD manufacturing extension', () => {
     expect(csv).toContain('"生产工艺"')
   })
 
+  test('filters helper solids and groups directional leg names', () => {
+    const stoolBodies: BodyMeasurement[] = [
+      {
+        id: 'template',
+        name: 'unitBox',
+        center: { x: 0, y: 0, z: 0 },
+        dimensions: { x: 1, y: 1, z: 1 },
+      },
+      {
+        id: 'seat',
+        name: 'seatBody',
+        center: { x: 0, y: 0, z: 310 },
+        dimensions: { x: 300, y: 220, z: 20 },
+      },
+      ...['frontLeftLeg', 'frontRightLeg', 'backLeftLeg', 'backRightLeg'].map(
+        (name, index): BodyMeasurement => ({
+          id: `leg-${index}`,
+          name,
+          center: { x: index % 2 ? 100 : -100, y: index < 2 ? -70 : 70, z: 150 },
+          dimensions: { x: 30, y: 30, z: 300 },
+        })
+      ),
+    ]
+
+    const filtered = filterManufacturingBodies(stoolBodies)
+    const rows = groupBodiesIntoBom(filtered)
+
+    expect(filtered).toHaveLength(5)
+    expect(rows).toHaveLength(2)
+    expect(rows.find((row) => row.name === 'Leg')?.quantity).toBe(4)
+    expect(rows.some((row) => row.name === 'unitBox')).toBe(false)
+  })
+
+  test('normalizes URL-safe engine snapshots for browser image rendering', () => {
+    expect(createSnapshotDataUrl('iVBORw0KGgo_8A')).toBe(
+      'data:image/png;base64,iVBORw0KGgo/8A=='
+    )
+    expect(
+      createSnapshotDataUrl('data:image/png;base64,iVBORw0KGgo_8A')
+    ).toBe('data:image/png;base64,iVBORw0KGgo/8A==')
+  })
+
   test('builds a printable dimensioned engineering sheet safely', () => {
     const rows = groupBodiesIntoBom(bodies)
     const html = createEngineeringSheetHtml({
diff --git a/vendor/zoo-modeling-app/HicadManufacturingPanel.tsx.template b/vendor/zoo-modeling-app/HicadManufacturingPanel.tsx.template
index c334ac39f..bc64270f4 100644
--- a/vendor/zoo-modeling-app/HicadManufacturingPanel.tsx.template
+++ b/vendor/zoo-modeling-app/HicadManufacturingPanel.tsx.template
@@ -8,8 +8,10 @@ import { useEffect, useMemo, useRef, useState } from 'react'
 import toast from 'react-hot-toast'
 import {
   buildExplodeOffsets,
+  createSnapshotDataUrl,
   createBomCsv,
   createEngineeringSheetHtml,
+  filterManufacturingBodies,
   getOverallBounds,
   groupBodiesIntoBom,
   type BodyMeasurement,
@@ -128,12 +130,6 @@ function formatNumber(value: number | undefined) {
   return Math.round(value * 100) / 100
 }
 
-function dataUrlFromSnapshot(contents: string) {
-  return contents.startsWith('data:')
-    ? contents
-    : `data:image/png;base64,${contents}`
-}
-
 export function HicadManufacturingPanel({
   hideTrigger = false,
   initialOpen = false,
@@ -274,7 +270,7 @@ export function HicadManufacturingPanel({
     ) {
       return undefined
     }
-    const dataUrl = dataUrlFromSnapshot(response.data.contents)
+    const dataUrl = createSnapshotDataUrl(response.data.contents)
     setSnapshot(dataUrl)
     return dataUrl
   }
@@ -411,7 +407,13 @@ export function HicadManufacturingPanel({
         )
       }
 
-      setBodies(measured)
+      const manufacturingBodies = filterManufacturingBodies(measured)
+      if (manufacturingBodies.length < measured.length) {
+        toast(
+          `已忽略 ${measured.length - manufacturingBodies.length} 个建模模板实体。`
+        )
+      }
+      setBodies(manufacturingBodies)
       await Promise.allSettled([
         engineViewIsometric({
           engineCommandManager: kclManager.engineCommandManager,
@@ -431,7 +433,7 @@ export function HicadManufacturingPanel({
           error
         )
       }
-      return measured
+      return manufacturingBodies
     } catch (error) {
       const message =
         error instanceof Error ? error.message : '工程数据分析失败'
diff --git a/vendor/zoo-modeling-app/manufacturing.ts b/vendor/zoo-modeling-app/manufacturing.ts
index e15c3d27d..7f20c6404 100644
--- a/vendor/zoo-modeling-app/manufacturing.ts
+++ b/vendor/zoo-modeling-app/manufacturing.ts
@@ -48,6 +48,61 @@ function roundDimension(value: number) {
   return Math.round(value * 100) / 100
 }
 
+function maximumDimension(body: BodyMeasurement) {
+  return Math.max(
+    Math.abs(body.dimensions.x),
+    Math.abs(body.dimensions.y),
+    Math.abs(body.dimensions.z)
+  )
+}
+
+function compactPartName(name: string) {
+  return name.trim().replaceAll(/[\s_-]+/g, '').toLowerCase()
+}
+
+function isKnownTemplateBody(body: BodyMeasurement) {
+  return /^unit(?:box|cube|cylinder[xyz]?|righttriangle[xyz]?)$/.test(
+    compactPartName(body.name)
+  )
+}
+
+export function filterManufacturingBodies(bodies: BodyMeasurement[]) {
+  if (bodies.length <= 1) return bodies
+
+  const hasProductionScaleBody = bodies.some(
+    (body) => maximumDimension(body) >= 20
+  )
+  const filtered = bodies.filter((body) => {
+    if (isKnownTemplateBody(body)) return false
+    return !(hasProductionScaleBody && maximumDimension(body) <= 2)
+  })
+
+  return filtered.length > 0 ? filtered : bodies
+}
+
+function normalizeBase64Payload(value: string) {
+  const normalized = value
+    .trim()
+    .replaceAll(/\s+/g, '')
+    .replaceAll('-', '+')
+    .replaceAll('_', '/')
+  return normalized.padEnd(Math.ceil(normalized.length / 4) * 4, '=')
+}
+
+export function createSnapshotDataUrl(contents: string) {
+  const trimmed = contents.trim()
+  if (trimmed.startsWith('data:')) {
+    const commaIndex = trimmed.indexOf(',')
+    if (commaIndex < 0 || !trimmed.slice(0, commaIndex).includes(';base64')) {
+      return trimmed
+    }
+    return `${trimmed.slice(0, commaIndex + 1)}${normalizeBase64Payload(
+      trimmed.slice(commaIndex + 1)
+    )}`
+  }
+  return `data:image/png;base64,${normalizeBase64Payload(trimmed)}`
+}
+
 function vectorLength(point: Point3d) {
   return Math.hypot(point.x, point.y, point.z)
 }
@@ -146,7 +201,12 @@ export function buildExplodeOffsets(
 
 function normalizePartName(name: string) {
   const cleaned = name.trim() || '未命名零件'
-  return cleaned.replace(/(?:[_-]?(?:copy|part))?[_-]?\d+$/i, '').trim() || cleaned
+  const withoutCopySuffix =
+    cleaned.replace(/(?:[_-]?(?:copy|part))?[_-]?\d+$/i, '').trim() || cleaned
+  const locationLegMatch = withoutCopySuffix.match(
+    /^(?:front|back|rear)(?:left|right)(leg|foot)$/i
+  )
+  return locationLegMatch?.[1] ?? withoutCopySuffix
 }
 
 function dimensionsKey(dimensions: Point3d) {