Is there a specific name for this type of bodice/underbust corset belt thing, specifically noting the curvature of the fabric under the breasts so it looks like it goes right under the

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Is there a specific name for this type of bodice/underbust corset belt thing, specifically noting the curvature of the fabric under the breasts so it looks like it goes right under the

Handmade Underbust Corset Belt Waterlilies Bustier Accessory

Is there a specific name for this type of bodice/underbust corset

I need to make the cups in this corset almost flat, how do I go