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2. Axial fan design - Wikipedia

   en.wikipedia.org/wiki/Axial_fan_design

   Surging should not be confused with stalling. Stalling occurs only if there is insufficient air entering into the fan blades causing separation of flow on the blade surface. Surging or the Unstable flow causing complete breakdown in fans is mainly contributed by the three factors System surge; Fan surge; Paralleling

3. Centrifugal fan - Wikipedia

   en.wikipedia.org/wiki/Centrifugal_fan

   Figure 1: Components of a centrifugal fan An external motor belt driven inline centrifugal fan discharging inline to the exterior of a building through a duct. Unlike non-inline/non-concentric impeller casing design with a cutoff blade above, the concentrically symetric cylinder casing and impeller geometry of inline type redirects the outflow around so that it is parallel to the inflow of gases.

4. Fan (machine) - Wikipedia

   en.wikipedia.org/wiki/Fan_(machine)

   This may direct the airflow, or increase safety by preventing objects from contacting the fan blades. Most fans are powered by electric motors, but other sources of power may be used, including hydraulic motors, handcranks, and internal combustion engines. Mechanically, a fan can be any revolving vane, or vanes used for producing currents of air.

5. Resin wicker - Wikipedia

   en.wikipedia.org/wiki/Resin_wicker

   The term "wicker" is often use in to refer to two things: a type of material, and the method used to create it.Wicker works are generally meant to be lightweight, flexible, and durable; to achieve this, the materials used must have those properties, and the weave pattern must reinforce the structure while using as little material as possible to avoid becoming too heavy or rigid.

6. Wicker - Wikipedia

   en.wikipedia.org/wiki/Wicker

   A wicker basket filled with apples. Wicker is a method of weaving used to make products such as furniture and baskets, as well as a descriptor to classify such products. It is the oldest furniture making method known to history, dating as far back as c. 3000 BC.

7. Wide chord - Wikipedia

   en.wikipedia.org/wiki/Wide_chord

   The wide chord fan on a Rolls-Royce Trent 970B- 84 installed on a British Airways Airbus A380. Wide chord describes the fan blades on certain turbofan engines that have a blade design with a specific geometry - In layman's terms, they would be described as having wider blades than other jet engines.