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  2. Piping and plumbing fitting - Wikipedia

    en.wikipedia.org/wiki/Piping_and_plumbing_fitting

    Short-radius (or regular) 45° elbow (copper sweat) Long-radius (or sweep) 90° elbow (copper sweat) An elbow is installed between two lengths of pipe (or tubing) to allow a change of direction, usually a 90° or 45° angle; 22.5° elbows are also available.

  3. Exhaust system - Wikipedia

    en.wikipedia.org/wiki/Exhaust_system

    The end of the final length of the exhaust pipe where it vents to open air, generally the only visible part of the exhaust system part on a vehicle, often ends with a straight or angled cut but may include a decorative tip. The tip is sometimes chromed. It frequently has a larger pipe than the rest of the exhaust system.

  4. AOL Mail

    mail.aol.com

    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

  5. National pipe thread - Wikipedia

    en.wikipedia.org/wiki/National_pipe_thread

    American Society of Mechanical Engineers National Pipe Thread Taper (NPT) [5] Nominal pipe size Thread density Thread pitch P Hand-tight engagement [6] Effective thread [6] Overall length L 4 [6] Actual outside diameter D Tap drill; Length L 1 Turns Diameter E 1 Length L 2 Turns Diameter E 2; inch inch −1 inch mm inch inch inch inch inch inch ...

  6. Harcourt (publisher) - Wikipedia

    en.wikipedia.org/wiki/Harcourt_(publisher)

    Harcourt School Publishers – U.S. elementary (pre-K–6) publisher with particular strength in the four major subject areas of science, reading, math and social studies. Holt, Rinehart and Winston – U.S. secondary (grades 6–12) publisher with a leading position in literature and language arts, the largest middle and secondary school ...

  7. Nominal Pipe Size - Wikipedia

    en.wikipedia.org/wiki/Nominal_Pipe_Size

    Nominal Pipe Size (NPS) is a North American set of standard sizes for pipes used for high or low pressures and temperatures. [1] " Nominal" refers to pipe in non-specific terms and identifies the diameter of the hole with a non-dimensional number (for example – 2-inch nominal steel pipe" consists of many varieties of steel pipe with the only criterion being a 2.375-inch (60.3 mm) outside ...

  8. Spline (mathematics) - Wikipedia

    en.wikipedia.org/wiki/Spline_(mathematics)

    Suppose the polynomial pieces are to be of degree 2, and the pieces on [0, 1] and [1, 2] must join in value and first derivative (at t = 1) while the pieces on [1, 2] and [2, 3] join simply in value (at t = 2). This would define a type of spline S(t) for which

  9. Moore graph - Wikipedia

    en.wikipedia.org/wiki/Moore_graph

    Some examples are the even cycles C 2n, the complete bipartite graphs K n,n with girth four, the Heawood graph with degree 3 and girth 6, and the Tutte–Coxeter graph with degree 3 and girth 8. More generally it is known that, other than the graphs listed above, all Moore graphs must have girth 5, 6, 8, or 12. [ 6 ]

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