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```
REC N VX VY VZ HX HY HZ R1X R1Y R1Z R2X R2Y R2Z
```

`N`

is a `VX`

, `VY`

,
`VZ`

)
is the center of one of the elliptical bases.
Vector (`HX`

,
`HY`

,
`HZ`

) extends from the
center of one base to the center of the other base.
Vectors (`R1X`

,
`R1Y`

,
`R1Z`

) and
(`R2X`

,
`R2Y`

,
`R2Z`

) define the major and minor axes
of the elliptical bases.
The Vectors **H**, **R1**, and **R2** must be mutually orthogonal.

The REC body is *not* drawn in line drawings.