The plate-like portion of each separator has a flat sectional shape.

The receptacle (1), or the upper receptacle edge (9), is tapered on the cover hood side, or the lid side, in accordance with a flat cut.

A quantity G(x) is distributed non-uniformly on either side of a flat section x = 0.

But fully interactively on standard graphics cards on a normal computer, I can just put in a clip plane.

Note that these additional symmetries do not allow a planar slice to have, say, 8-fold rotation symmetry.

The cutting face may be non- planar.

The plurality of primary cutting elements include cutting elements having a first non-planar shape and the plurality of backup cutting elements include cutting elements having a second, different non-planar shape.

The cutting insert is formed in a generally plate shape.

The cutting platform has an elevated planar cutting surface (11) supported on a narrower base (12).

The face cutting edge defines a planar, face cutting surface of revolution of the cutting head, and the chip cutting edge defines a conical, chip cutting surface of revolution of the cutting head.

The plate-like portion of each separator has a flat sectional shape.

Each cutting member has a substantially planar cutting surface (32A) extending substantially parallel to, and offset from, the main axis.

To cut both a planar face and two opposed, radiused corners, the cutting edges include respective linear face-cutting portions disposed between two concave, arcuate corner-cutting portions.

With this configuration, the proximal portion is planar with a plane of the cutting window.

The planar portion may be spaced apart from the cutting edges associated with that side surface.