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2. Genaille–Lucas rulers - Wikipedia

   en.wikipedia.org/wiki/Genaille–Lucas_rulers

   Genaille–Lucas rulers (also known as Genaille's rods) are an arithmetic tool invented by Henri Genaille, a French railway engineer, in 1891. The device is a variant of Napier's bones . By representing the carry graphically, the user can read off the results of simple multiplication problems directly, with no intermediate mental calculations .

3. Parallel rulers - Wikipedia

   en.wikipedia.org/wiki/Parallel_rulers

   Parallel rule in plastic with aluminum arms lying on a cutting mat. Parallel rulers are a drafting instrument used by navigators to draw parallel lines on charts. The tool consists of two straight edges joined by two arms which allow them to move closer or further away while always remaining parallel to each other.

4. Technical drawing tool - Wikipedia

   en.wikipedia.org/wiki/Technical_drawing_tool

   A scale ruler is a scaled, three-edged ruler which has six different scales marked to its sides. A typical combination for building details is 1:20, 1:50, 1:100, 1:25, 1:75 and 1:125. There are separate rulers for zoning work as well as for inch units. Today scale rulers are made of plastic, formerly they were made of hardwood. A pocket-sized ...

5. Ruler - Wikipedia

   en.wikipedia.org/wiki/Ruler

   A variety of rulers A carpenter's rule Retractable flexible rule or tape measure A closeup of a steel ruler A ruler in combination with a letter scale. A ruler, sometimes called a rule, scale or a line gauge or metre/meter stick, is an instrument used to make length measurements, whereby a length is read from a series of markings called "rules" along an edge of the device. [1]

6. 2 dead in Kamaka Air plane crash near Honolulu Airport during ...

   www.aol.com/2-dead-plane-crashed-building...

   Two people are dead after a plane crashed into a building near the Daniel K. Inouye International Airport in Honolulu, according to reports. At around 3:15 p.m. local time on Tuesday, Kamaka Air ...

7. We all need HGH, the hormone responsible for growth. What ...

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   Get sweaters on sale for the whole family during Nordstrom's Half-Yearly Sale: Up to 60% off must-have brands ... Where to shop today's best deals: Kate Spade, Amazon, Walmart and more. See all ...