diff --git a/1.6/1.6/Defs/Effects/Mote_Wula.xml b/1.6/1.6/Defs/Effects/Mote_Wula.xml
index b6b77e23..b79d37d0 100644
--- a/1.6/1.6/Defs/Effects/Mote_Wula.xml
+++ b/1.6/1.6/Defs/Effects/Mote_Wula.xml
@@ -1,5 +1,23 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Defs>
+  <!-- 有一个verb的cs引用了这个，勿删 -->
+  <ThingDef ParentName="MoteBase">
+    <defName>ExcaliburBeam</defName>
+    <thingClass>WulaFallenEmpire.Thing_ExcaliburBeam</thingClass>
+    <label>Excalibur Beam</label>
+    <altitudeLayer>MoteOverhead</altitudeLayer>
+    <graphicData>
+      <texPath>Things/Mote/PowerBeam</texPath>
+      <shaderType>MoteGlow</shaderType>
+    </graphicData>
+    <drawOffscreen>true</drawOffscreen>
+    <mote>
+      <fadeInTime>0.5</fadeInTime>
+      <solidTime>9.3</solidTime>
+      <fadeOutTime>1.0</fadeOutTime>
+    </mote>
+  </ThingDef>
+
   <ThingDef ParentName="MoteBase">
     <defName>Mote_Wula_Dark_Matter_Beam</defName>
     <thingClass>MoteDualAttached</thingClass>
diff --git a/1.6/1.6/Defs/ThingDefs_Misc/Weapons/ThingDef_ExcaliburBeam.xml b/1.6/1.6/Defs/ThingDefs_Misc/Weapons/ThingDef_ExcaliburBeam.xml
deleted file mode 100644
index a286f4b0..00000000
--- a/1.6/1.6/Defs/ThingDefs_Misc/Weapons/ThingDef_ExcaliburBeam.xml
+++ /dev/null
@@ -1,19 +0,0 @@
-<?xml version="1.0" encoding="utf-8" ?>
-<Defs>
-  <ThingDef ParentName="MoteBase">
-    <defName>ExcaliburBeam</defName>
-    <thingClass>WulaFallenEmpire.Thing_ExcaliburBeam</thingClass>
-    <label>Excalibur Beam</label>
-    <altitudeLayer>MoteOverhead</altitudeLayer>
-    <graphicData>
-      <texPath>Things/Mote/PowerBeam</texPath>
-      <shaderType>MoteGlow</shaderType>
-    </graphicData>
-    <drawOffscreen>true</drawOffscreen>
-    <mote>
-      <fadeInTime>0.5</fadeInTime>
-      <solidTime>9.3</solidTime>
-      <fadeOutTime>1.0</fadeOutTime>
-    </mote>
-  </ThingDef>
-</Defs>
\ No newline at end of file
diff --git a/1.6/1.6/Defs/ThingDefs_Misc/Weapons/WULA_FE_Missile_Weapon.xml b/1.6/1.6/Defs/ThingDefs_Misc/Weapons/WULA_FE_Missile_Weapon.xml
index 8df6bee0..4da651dc 100644
--- a/1.6/1.6/Defs/ThingDefs_Misc/Weapons/WULA_FE_Missile_Weapon.xml
+++ b/1.6/1.6/Defs/ThingDefs_Misc/Weapons/WULA_FE_Missile_Weapon.xml
@@ -20,6 +20,9 @@
       <researchPrerequisite>WULA_Synth_Weapon_2_Missile_Technology</researchPrerequisite>
       <unfinishedThingDef>UnfinishedWeapon</unfinishedThingDef>
     </recipeMaker>
+    <researchPrerequisites>
+      <li>WULA_Adv_WorkTable_Technology</li>
+    </researchPrerequisites>
     <statBases>
       <WorkToMake>2500</WorkToMake>
       <!-- <MarketValue>370</MarketValue> -->