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Laser marking on stainless steel A laser engraving machine A laser engraver. A laser engraving machine consists of three main parts: a laser, a controller, and a surface. [2] The laser is a drawing tool: the beam emitted from it allows the controller to trace patterns onto the surface.
Download as PDF; Printable version; In other projects Wikidata item; Appearance. move to sidebar hide. A lock and key is a pair of ...
A keychain (/ ˈ k i t ʃ eɪ n / ⓘ) (also keyring) is a small ring or chain of metal to which several keys, or fobs can be attached. The terms keyring & keychain are often used interchangeably to mean both the individual ring, or a combined unit of a ring and fob.
Stacks of compact disc jewel cases. Optical disc packaging is the packaging that accompanies CDs, DVDs, and other formats of optical discs.Most packaging is rigid or semi-rigid and designed to protect the media from scratches and other types of exposure damage.
Dorney Park & Wildwater Kingdom is an amusement and water park located in Dorneyville, Pennsylvania, outside Allentown, in the United States.Owned and operated by Six Flags Entertainment Corporation, the park features 64 rides, including eight roller coasters, several thrill rides and kiddie rides, and a waterpark, Wildwater Kingdom, with 19 water rides.
In 1871, Justus Roe introduced a cost cutting technique to the tape measure. [14] Employing rivets to attach small brass washers to the tape, he could mark inches and feet. To further enhance readability, small brass tags were affixed at five-foot intervals, each bearing a number indicating the total number of feet to that point. [15]
The Kubotan keychain was originally based on a small bamboo weapon called a "hashi stick", an invention by Kubota's father, Denjiro. Its popularity grew from 1969 to the 1970s when Kubota, at the request of California State Senator Edward M. Davis, the former Chief of the Los Angeles Police Department, created the weapon and began training female officers in its application.
Impressions of several natural phenomena and the principles of some optical toys have been attributed to persistence of vision. In 1768, Patrick D'Arcy recognised the effect in "the luminous ring that we see by turning a torch quickly, the fire wheels in the fireworks, the flattened spindle shape we see in a vibrating cord, the continuous circle we see in a cogwheel that turns with speed". [8]
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