Sections (or balloons) are utilized in design drafting to explain requirements in a specific section. This can often get extremely “busy” as more and more information is added to the section view (to avoid a second section view) or as new ideas are generated during the design phase.
The importance of section views is to communicate required details. If there seems to be too much (or not enough) information, take time in reading that area because you could overlook a critical piece of information that could significantly change the product/mold design.
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