The Dual Object Combine mode trims or extends to combine two objects into a single object at their endpoints or intersections. Only open objects, such as lines and NURBS curves and surfaces, can be connected.
To combine two objects:
Click the Connect/Combine tool from the Basic palette, and select Dual Object Combine from the Tool bar.
Click the first, and then the second, object to combine.
The two objects are trimmed or extended if necessary and combined into one object.
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