Specifying the Wire Segment Radius
Specify the wire segment radius as 0.001 m.
myProject.Mesher.Settings.WireRadius = "0.001"

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Since the Mesher object meshes the model, search for
Mesher (object) in the Help1.
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MeshSettings (object):
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Fill in the wire segment radius:
WireRadius = "0.001"
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Determine the syntax to prepend to WireRadius: