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In a variation called the Egyptian bow drill, the cord is wound around the shaft multiple times, or is fixed to it by a knot or a hole. [citation needed] The strap drill is a simpler version, where the bow is absent and the cord is kept taut by pulling the ends with both hands, while moving them left and right at the same time. In the absence ...
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A fire drill, sometimes called fire-stick, is a device to start a fire by friction between a rapidly rotating wooden rod (the spindle or shaft) and a cavity on a stationary wood piece (the hearth or fireboard).
Native American drilling turquoise with a pump drill. [2] To use, the shaft is first turned by hand so that the cord wraps around the top part, as much as possible, and the board is as the highest position. A smooth downward pressure is exerted on the board, causing the shaft to rapidly spin. Once the bottom is reached, the pressure is relieved.
PSE, short for Precision Shooting Equipment, was founded by Pete Shepley, a product engineer of Magnavox, as a part-time pursuit. Shepley was a specialist in creating archery equipment and created the company in 1970 to manufacture his own products. PSE was one of five companies to have produced the first compound bows. [5]
Roughly at this time is the last migration wave of the Austronesian expansion, when the Polynesian islands spread over vast distances across the Pacific Ocean were being colonized by the (Austronesian) Polynesians from Island Melanesia using double-hulled voyaging catamarans.
A typical kitchen timer. A timer or countdown timer is a type of clock that starts from a specified time duration and stops upon reaching 00:00. An example of a simple timer is an hourglass. Commonly, a timer triggers an alarm when it ends. A timer can be implemented through hardware or software.
Hand drills have been used by many primitive societies as a fire drill to start a fire. [1] It is still often learned as a useful survival skill. A hand drill could also be used as a tool for drilling holes in hard materials such as wood, stone, or bone. For either use, the hands must also exert downward pressure while spinning the rod.
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