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This is the second part of the hammer assembly
http://grabcad.com/questions/tutorial-assembly-design-catia-v5
You will see how to add sheets, creating a bill of material and ref balloons and more.
Here is a video tutorial
http://www.youtube.com/watch?v=f4kHLzcP5q8
Step 1
parts can be download here Hammer assembly tutorial
creating parts and making a draftingStep 2
adding bill of material
Step 3
adding reference balloons