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2. Ceramic matrix composite - Wikipedia

   en.wikipedia.org/wiki/Ceramic_matrix_composite

   This slide bearing concept, namely SiC/SiC shaft sleeve and SiC bearing, has been used since 1994 in applications such as in the boiler feedwater pumps of power stations, [46] which pump several thousand cubic meters of hot water to a level of 2,000 m (6,600 ft), and in tubular casing pumps [47] for water works or seawater desalination plants ...

3. Composite material - Wikipedia

   en.wikipedia.org/wiki/Composite_material

   Composite materials are also becoming more common in the realm of orthopedic surgery, [42] and it is the most common hockey stick material. Carbon composite is a key material in today's launch vehicles and heat shields for the re-entry phase of spacecraft. It is widely used in solar panel substrates, antenna reflectors and yokes of spacecraft.

4. Sinc function - Wikipedia

   en.wikipedia.org/wiki/Sinc_function

   The sinc function as audio, at 2000 Hz (±1.5 seconds around zero) In mathematics, the historical unnormalized sinc function is defined for x ≠ 0 by ⁡ = ⁡.. Alternatively, the unnormalized sinc function is often called the sampling function, indicated as Sa(x).