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Reference
Edit Mode
Toolbar ‣ Extrude Manifold
Mesh ‣ Extrude ‣ Extrude Manifold
Alt-E
This tool is very similar to 挤出面 but enables Dissolve Orthogonal Edges by default. This causes the tool to automatically split and remove adjacent faces when extruding inwards.
Extrude Manifold Example.¶