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The cutting tool may also be fed at an angle, relative to the axis of the work, for machining taper and angles. Collets, centers, three jaw chucks, and other work-holding attachments can all be held in spindle. The tailstock can hold tools for drilling, threading, reaming, or cutting tapers. Additionally, it can support the end of tdb.com.vn the workpiece using a center and can be adjusted to adapt to different workpiece lengths. As described in the previous section, live tooling can also be used for turning, which includes the use of mills, drills, reamers, and taps. These are cylindrical multi-point cutting tools that have sharp teeth spaced around the exterior. Compound Lathes with a very large spindle bore and a chuck on both ends of the spindle are called "oil field lathes". The spindle is driven either by foot power from a treadle and flywheel or by a belt or gear drive from a power source such as electric motor or overhead line shafts. In most modern lathes this p...

In the NFL, a referee can ask for a review from the replay booth, or a head coach can issue a challenge to review the play using replays. A video referee can also use replays to help decision-making in rugby . In international cricket, an umpire can ask the Third umpire for a decision, and the third umpire makes the final decision. Colts Steal Overtime Win In Sloppy Touchdown From the gamut of games played by the upper and middle classes, the industrial workers of Europe and Latin America, like the indigenous population of Africa, appropriated football as their own. In all probability, polo evolved from a far rougher game played by the nomads of Afghanistan and Central Asia. In the form that survived into the 21st century, Afghan buzkashi is characterized by a dusty melee in which hundreds of mounted tribesmen fought over the headless carcass of a goat. Bears Oc Not Worried About Fields Amid League Research suggests that sports have the capacity to connect youth to positive adult...