5.Let's-build/Nacelle.md

@@ -26,7 +26,7 @@
 
 ![SubAssembly.Nacelle_1](../img/Nacelle/SubAssembly.Nacelle_1.png)
 
-## 2.Spot-weld Upper Spacer on to the Yaw Pipe
+## 2.Tack-weld Upper Spacer on to the Yaw Pipe
 
 ![SubAssembly.Nacelle_2](../img/Nacelle/SubAssembly.Nacelle_2.png)
 
@@ -34,7 +34,7 @@
 
 ![SubAssembly.Nacelle_3](../img/Nacelle/SubAssembly.Nacelle_3.png) ![SubAssembly.Nacelle_4](../img/Nacelle/SubAssembly.Nacelle_4.png)
 
-## 4.Spot-weld Bearing Mounting Plate and Lower Spacer
+## 4.Tack-weld Bearing Mounting Plate and Lower Spacer
 
 ![SubAssembly.Nacelle_5](../img/Nacelle/SubAssembly.Nacelle_5.png)