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Ultimaker.md

@@ -68,3 +68,6 @@ The print must fit in a 20x20x20cm cube. It is best to lay the model flat vs to
 ## Glossary of terms: 
 <https://ultimaker.com/en/resources/22055-glossary>
 
+
+## questions
+- stl data format , triangular vs quad meshes???