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===Assembly===
===Assembly===
<strong>Step 32:</strong> It's time to assemble the three parts we have built into the finished product. SolidWorks assemblies are one of the greatest advantages of this CAD software because they allow the user to see how everything fits together and detect errors before starting the building process. For this, we will open a new SolidWorks window and select Assembly. SolidWorks will ask you to import a part into the assembly; find the file containing your train whistle body, click open, and place it in the drawing space. On the Assembly tab, click on Insert Components to add more parts to the assembly. Import the mouthpiece and four fipple blocks (just do it four times). Place them all in the drawing space.
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<strong>Step 33:</strong> On the Assembly tab, you'll see the Mate function. We are going to use this a lot to tell SolidWorks which points/lines/surfaces will be coincident/parallel/perpendicular to each other. There are many ways to do this. Basically, click Mate, click on two things that you want to relate to each other, modify the relationship with the Standard Mates section in the left column, and click the green checkmark when you are happy. Rinse and repeat. The next three screenshots show this progression. Remember that you can use the Display Style icon to see a wireframe version of the full assembly to ensure all mates and dimensions align. This is also a good time to go to the Evaluate tab and click on the Measure tool. You can record any final measurements that you need before the sawdust starts flying. If everything looks good, you're ready to start building. <!--The next section of this TV shows the building process. -->
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