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A pencil case can also contain a variety of other stationery such as sharpeners, pens, glue sticks, erasers, scissors, and rulers. Pencil cases can be made from a variety of materials such as wood or metal. Some pencil cases have a hard and rigid shell encasing the pens inside, while others use a softer material such as plastic, leather or cotton.
In addition to being more durable than a leather or cloth case due to its rigidity, the aluminium case seals tightly against dust and water. Famously, the nuclear football , the briefcase which the President of the United States can use to order a nuclear strike, is a modified Zero Halliburton case, [ 1 ] although enclosed in a black leather ...
An attaché case (or sometimes called diplomat case) is a box-style case characteristically made of leather fitted over an internal hinged frame that opens into two compartments. It was traditionally carried by an attaché , a diplomatic officer attached to an embassy or consulate officially assigned to serve in a particular capacity (e.g ...
S-glass has a strength of 700,000 pounds per square inch (4,800 MPa) while E-glass and C-glass have a strength of 500,000 pounds per square inch (3,400 MPa). [ 9 ] Hardness
On 3 September 2007, Ashrita Furman unveiled his giant US$20,000 pencil – 23 metres (76 ft) long, 8,200 kilograms (18,000 lb) with over 2,000 kilograms (4,500 lb) for the graphite centre – after three weeks of creation in August 2007 as a birthday gift for teacher Sri Chinmoy. It is longer than the 20-metre (65 ft) pencil outside the ...
A mechanical pencil or clutch pencil is a pencil with a replaceable and mechanically extendable solid pigment core called a "lead" / ˈ l ɛ d /. The lead , often made of graphite , is not bonded to the outer casing, and the user can mechanically extend it as its point is worn away from use.
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