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A Swivel is a mechanical device used on a drilling rig that hangs directly under the traveling block and directly above the kelly drive, that provides the ability for the kelly (and subsequently the drill string) to rotate while allowing the traveling block to remain in a stationary rotational position (yet allow vertical movement up and down the derrick) while simultaneously allowing the ...
Drill bit (#26) is a device attached to the end of the drill string that breaks apart the rock being drilled. It contains jets through which the drilling fluid exits. Drill floor (#21) is the area on the rig where the tools are located to make the connections of the drill pipe, bottom hole assembly, tools and bit. It is considered the main area ...
Drill commands are generally used with a group that is marching, most often in military foot drills or in a marching band. [ 1 ] [ 2 ] [ 3 ] Drill commands are usually heard in major events involving service personnel, reservists and veterans of a country's armed forces, and by extension, public security services and youth uniformed organizations.
A swivel, swivelling, spinny, or revolving chair is a chair with a single central leg that allows the seat to rotate 360 degrees to the left or right. A concept of a rotating chair with swivel castors was illustrated by the Nuremberg noble Martin Löffelholz von Kolberg in his 1505 technological illuminated manuscript , the so-called Codex ...
The Avro Type 694 Lincoln is a British four-engined heavy bomber, which first flew on 9 June 1944. Developed from the Avro Lancaster, the first Lincoln variants were initially known as the Lancaster IV and V; these were renamed Lincoln I and II. It was the 2nd to last piston-engined bomber operated by the Royal Air Force (RAF).
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.
Most Marines that fall under the category of NCO or SNCO will be mandated to take a leadership course. Part of these courses require Marines to complete multiple drills. One of those drills is the Sword Manual. NCOs [1] take Corporal's Course [1] take Sergeants Course; SNCOs [1] take SNCO Academy [1] take SNCO Academy; Marine using an NCO Sword ...
The Drill, previously known as Lincoln Drill Hall, [1] is a former drill hall in Lincoln, England, which is now used as a multi-purpose community hub, hosting live music, comedy shows, pantomimes [2] and live wrestling performances. [3] It is currently under the stewardship of the Lincoln College Group. [4]