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2. Polyoxymethylene - Wikipedia

   en.wikipedia.org/wiki/Polyoxymethylene

   Polyoxymethylene(POM), also known as acetal,[4]polyacetal, and polyformaldehyde, is an engineering thermoplasticused in precision parts requiring high stiffness, low friction, and excellent dimensional stability. Short-chained POM (chain length between 8 and 100 repeating units) is also better known as paraformaldehyde(PFA).

3. Wood–plastic composite - Wikipedia

   en.wikipedia.org/wiki/Wood–plastic_composite

   Wood–plastic composite. Wood–plastic composites (WPCs) are composite materials made of wood fiber / wood flour and thermoplastic (s) such as polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), or polylactic acid (PLA). In addition to wood fiber and plastic, WPCs can also contain other ligno-cellulosic and/or inorganic filler ...

4. 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.

5. Carbon-fiber reinforced polymer - Wikipedia

   en.wikipedia.org/wiki/Carbon-fiber_reinforced...

   In addition, the choice of matrix can have a profound effect on the properties of the finished composite. [18] Many CFRP parts are created with a single layer of carbon fabric that is backed with fiberglass. [19] A tool called a chopper gun is used to quickly create these composite parts.

6. Door - Wikipedia

   en.wikipedia.org/wiki/Door

   A door is a hinged or otherwise movable barrier that allows ingress (entry) into and egress (exit) from an enclosure. The created opening in the wall is a doorway or portal. A door's essential and primary purpose is to provide security by controlling access to the doorway (portal). Conventionally, it is a panel that fits into the doorway of a ...

7. AOL Mail

   mail.aol.com

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