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2. Rotary storage - Wikipedia

   en.wikipedia.org/wiki/Rotary_storage

   Rotary storage systems are filing cabinets; specialised office furniture units usually consisting of a double sided rotating unit, allowing the user to access two full sides of filing from one point. A foot pedal or lever is often used to operate the rotation mechanism, thus allowing user easy control.

3. Pen spinning - Wikipedia

   en.wikipedia.org/wiki/Pen_spinning

   A combination of pen spinning tricks. Pen spinning is a form of object manipulation that involves the deft manipulation of a writing instrument with hands. Although it is often considered a form of self-entertainment (usually in a school or office setting), multinational competitions and meetings are sometimes held. [1]

4. Mechanical pencil - Wikipedia

   en.wikipedia.org/wiki/Mechanical_pencil

   older, used in pencils like the Yard-O-Led; a nominal size, same as 1.1 and 1.2 1.30 (0.051) Staedtler and Pentel (colour leads only for Pentel) 1.40 (0.055) Faber-Castell e-Motion and the new Lamy ABC as well as some Stabilo children's pencils 2.00: 0.075 or 0.078: drafting and artist’s clutch pencils 2.80: approximately 0.112: carpentry ...

5. Pantry - Wikipedia

   en.wikipedia.org/wiki/Pantry

   Often billed as a "pantry and kitchen in one", the Hoosier brought the ease and readiness of a pantry, with its many storage spaces and working counter, right into the kitchen. It was sold in catalogues and through a unique sales program geared towards farm wives. Today, the Hoosier cabinet is a much sought-after domestic icon and widely ...

6. List of inventors - Wikipedia

   en.wikipedia.org/wiki/List_of_inventors

   Andrey Nartov (1683–1756), Russia – first lathe with a mechanic cutting tool-supporting carriage and a set of gears, fast-fire battery on a rotating disc, screw mechanism for changing the artillery fire angle, gauge–boring lathe for cannon-making, early telescopic sight; James Nasmyth (1808–1890), Scotland – steam hammer

7. Pencil (geometry) - Wikipedia

   en.wikipedia.org/wiki/Pencil_(geometry)

   A pencil of circles (or coaxial system) is the set of all circles in the plane with the same radical axis. [9] To be inclusive, concentric circles are said to have the line at infinity as a radical axis. There are five types of pencils of circles, [10] the two families of Apollonian circles in the illustration above represent two of them.