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2. Head (company) - Wikipedia

   en.wikipedia.org/wiki/Head_(company)

   Head Sport GmbH is an American-Austrian manufacturing company headquartered in Kennelbach.It owns the American tennis racket brand Head. Head GmbH is a group that includes several previously independent companies, including the original "Head Ski Company" (founded in the United States in 1950); Tyrolia, an Austrian ski-equipment manufacturer; and Mares, an Italian manufacturer of diving equipment.

3. Pressure head - Wikipedia

   en.wikipedia.org/wiki/Pressure_head

   Pressure head is a component of hydraulic head, in which it is combined with elevation head. When considering dynamic (flowing) systems, there is a third term needed: velocity head. Thus, the three terms of velocity head, elevation head, and pressure head appear in the head equation derived from the Bernoulli equation for incompressible fluids:

4. Halo-gravity traction device - Wikipedia

   en.wikipedia.org/wiki/Halo-gravity_traction_device

   Halo-gravity traction (HGT) is a type of traction device utilized to treat spinal deformities such as scoliosis, [1] [2] congenital spine deformities, cervical instability, basilar invagination, and kyphosis. [3] It is used prior to surgical treatment to reduce the difficulty of the following surgery and the need for a more dangerous surgery.

5. Water wheel - Wikipedia

   en.wikipedia.org/wiki/Water_wheel

   Vitruvius (X 9.5–7) describes multi-geared paddle wheels working as a ship odometer, the earliest of its kind. The first mention of paddle wheels as a means of propulsion comes from the 4th–5th century military treatise De Rebus Bellicis (chapter XVII), where the anonymous Roman author describes an ox-driven paddle-wheel warship. [46]

6. Total dynamic head - Wikipedia

   en.wikipedia.org/wiki/Total_dynamic_head

   In fluid dynamics, total dynamic head (TDH) is the work to be done by a pump, per unit weight, per unit volume of fluid.TDH is the total amount of system pressure, measured in feet, where water can flow through a system before gravity takes over, and is essential for pump specification.

7. Strong at any age: Readers 65 and up share their favorite ...

   www.aol.com/news/strong-age-readers-65-share...

   It is free at public parks and you can paddle up and rotate into a game with very friendly players. The bonus of socializing and new friendships is vital for seniors and their mental health.

8. The 7 best gray hair treatments of 2025, according to hair ...

   www.aol.com/lifestyle/best-gray-hair-treatments...

   Once you snag your leave-in of choice, you can head over and take a look at what The Hair Lab calls its "doses." These are add-ins formulated to work with any of the brand's products, each ...

9. Hydraulic head - Wikipedia

   en.wikipedia.org/wiki/Hydraulic_head

   Hydraulic head or piezometric head is a measurement related to liquid pressure (normalized by specific weight) and the liquid elevation above a vertical datum. [ 1 ] [ 2 ] It is usually measured as an equivalent liquid surface elevation, expressed in units of length, at the entrance (or bottom) of a piezometer .