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Click Item Assignment
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Select the POSITIONING.2 and FASTENING.4 activities.
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Select the PositionSys.1 positioning system, in Positioning Systems category.
The PositionSys.1 positioning system is assigned to the POSITIONING.2 and FASTENING.4 activities. 
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Re-click Item Assignment
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Select the POSITIONING.2 and FASTENING.4 activities.
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Select the Positioning System.5 positioning system, in Positioning Systems category.
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Re-click Item Assignment
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Select the RELEASE.2 activity.
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Select the Positioning System.6 positioning system, in Positioning Systems category.
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Re-click Item Assignment
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Select the POSITIONING.2, FASTENING.4 and RELEASE.2 activities.
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Select the TolerancingBag.1 tolerancing bag, in Annotation Bags category.
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Re-click Item Assignment
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Select the Spot Welding.4.1, Spot Welding.4.2 and Spot Welding.4.3 spots welding, in Fastening Elements category.
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Select the FASTENING.4 activity.
Activities look like this: 
