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  2. Broaching (metalworking) - Wikipedia

    en.wikipedia.org/wiki/Broaching_(metalworking)

    Vertical broaching machines can be designed for push broaching, pull-down broaching, pull-up broaching, or surface broaching. Push broaching machines are similar to an arbor press with a guided ram; typical capacities are 5 to 50 tons. The two ram pull-down machine is the most common type of broaching machine.

  3. Three-two pull down - Wikipedia

    en.wikipedia.org/wiki/Three-two_pull_down

    In the United States and other countries where television uses the 59.94 Hz vertical scanning frequency, video is broadcast at 29.97 frame/s. For the film's motion to be accurately rendered on the video signal, a telecine must use a technique called the 2:3 pull down (or a variant called 3:2 pull down) to convert from 24 to 29.97 frame/s.

  4. Bellcrank - Wikipedia

    en.wikipedia.org/wiki/Bellcrank

    Illustration of a bellcrank from the 1908 Chambers's Twentieth Century Dictionary. A bellcrank is a type of crank that changes motion through an angle. The angle can range from 0 to 360 degrees, but 90-degree and 180-degree bellcranks are most common.

  5. List of musical symbols - Wikipedia

    en.wikipedia.org/wiki/List_of_musical_symbols

    Musical symbols are marks and symbols in musical notation that indicate various aspects of how a piece of music is to be performed. There are symbols to communicate information about many musical elements, including pitch, duration, dynamics, or articulation of musical notes; tempo, metre, form (e.g., whether sections are repeated), and details about specific playing techniques (e.g., which ...

  6. Via (electronics) - Wikipedia

    en.wikipedia.org/wiki/Via_(electronics)

    As vertical structures crossing multiple layers, they are specified differently from most of the design, which increases the chance for errors. They place the strictest demands on registration (how closely aligned different layers are). They are manufactured with different tooling from other features -- tooling that typically has looser tolerances.

  7. List of abbreviations in oil and gas exploration and production

    en.wikipedia.org/wiki/List_of_abbreviations_in...

    TVDRT – true vertical depth (referenced to) rotary table zero datum; TVDKB – true vertical depth (referenced to) top kelly bushing zero datum; TVDSS – true vertical depth (referenced to) mean sea level zero datum; TVELD – time and velocity to depth; TVRF – true vertical depth versus repeat formation tester; TWT – two-way time (seismic)

  8. Broach (nautical) - Wikipedia

    en.wikipedia.org/wiki/Broach_(nautical)

    A broach is an abrupt, involuntary change in a vessel's course, towards the wind, resulting from loss of directional control, when the vessel's rudder becomes ineffective. This can be caused by wind or wave action. A wind gust can heel (lean) a sailing vessel, lifting its rudder out of the water. Both power and sailing vessels can broach when ...

  9. Negative pulldown - Wikipedia

    en.wikipedia.org/wiki/Negative_pulldown

    The majority of 35 mm film systems, cameras, telecine equipment, optical printers, or projectors, are configured to accommodate the 4-perf system; each frame of 35 mm is 4 perforations long. 4-perf was (and remains) the traditional system, and the majority of projectors are based on 4-perf, because 4 perforations is the amount needed per frame vertically in order to have enough negative space ...