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2. Close-ratio transmission - Wikipedia

   en.wikipedia.org/wiki/Close-ratio_transmission

   The designation of wide versus close ratio affected the lowest gear ratio; for example, the four-speed Muncie transmissions offered in General Motors performance vehicles included the M20 "wide ratio" transmission, which had a first gear ratio of 2.52 or 2.56:1, while the M21 and M22 "close ratio" transmissions had a first gear ratio of 2.20:1.

3. Worm drive - Wikipedia

   en.wikipedia.org/wiki/Worm_drive

   Therefore, regardless of the worm's size (sensible engineering limits notwithstanding), the gear ratio is the "size of the worm wheel - to - 1". Given a single-start worm, a 20-tooth worm wheel reduces the speed by the ratio of 20:1. With spur gears, a gear of 12 teeth must match with a 240-tooth gear to achieve the same 20:1 ratio.

4. ZF 6HP transmission - Wikipedia

   en.wikipedia.org/wiki/ZF_6HP_transmission

   ZF 6HP transmission. 6HP is ZF Friedrichshafen AG's trademark name for its six-speed automatic transmission models ( 6 -speed transmission with H ydraulic converter and P lanetary gearsets) for longitudinal engine applications, designed and built by ZF's subsidiary in Saarbrücken. Released as the 6HP 26 in 2000, it was the first six-speed ...

5. List of common display resolutions - Wikipedia

   en.wikipedia.org/wiki/List_of_common_display...

   16:9. 8,294,400. 7680 × 4320. 8K UHDTV. 4320p. 33,177,600. Many of these resolutions are also used for video files that are not broadcast. These may also use other aspect ratios by cropping otherwise black bars at the top and bottom which result from cinema aspect ratios greater than 16∶9, such as 1.85 or 2.35 through 2.40 (dubbed ...

6. Display aspect ratio - Wikipedia

   en.wikipedia.org/wiki/Display_aspect_ratio

   The display aspect ratio ( DAR) is the aspect ratio of a display device and so the proportional relationship between the physical width and the height of the display. It is expressed as two numbers separated by a colon ( x: y ), where x corresponds to the width and y to the height. Common aspect ratios for displays, past and present, include 5: ...

7. Helium–neon laser - Wikipedia

   en.wikipedia.org/wiki/Helium–neon_laser

   Helium–neon laser. Helium–neon laser at the University of Chemnitz, Germany. A helium–neon laser or He-Ne laser is a type of gas laser whose high energetic medium gain medium consists of a mixture of ratio (between 5:1 and 20:1) of helium and neon at a total pressure of approximately 1 Torr (133 Pa) inside a small electrical discharge.