奶嘴三维模型

Create a precise rotationally symmetrical baby bottle nipple from an engineering drawing. Dimensions in mm: total height 57, max body diameter 38, neck diameter 12, upper bulb max diameter 18, lower waist diameter 23. Smooth spline profile with continuous curvature. Rounded transitions (R4 approx.). Flat circular top at the tip. Ignore any 0.6 mm asymmetry from the drawing. Generate as a solid body of revolution around the vertical center axis. Material appearance: medical silicone, neutral gray. No textures, logos, seams, patterns, holes, or decorative details. Manufacturing-grade geometry, smooth NURBS-like surface, watertight mesh, high polygon resolution. Prioritize dimensional accuracy over artistic interpretation. Clean topology, CAD-ready, export as high-quality STL suitable for Exocad modeling workflow.