1. The non-linear differential equations of cylindrically anisotropic plates given byWolmir are shown to be fundamentally wrong.

2. A roller bearing cage has a cage element adapted for retaining the generally cylindrically shaped rollers and allowing the rollers to be rollable therein.

3. This paper introduces one non interceptive beam intensity measurement by using a cylindrically capacitive which is originally used for the measurements of beam bunch length and central phase.