Aluminium profiles are by-products usually for structural purposes. It is possible to distinguish three types of profiles according to their use: construction, architectural and industrial.
Construction profiles: this profiles offers high bending and torsional stiffness despite their low net weight. Solar panel frames, structures for working platforms and scenarios, etc.
Architectural profiles: For this applications is very important the surface finish. Architectural profiles are used to made frameworks for windows, doors and curtain walls.
http://www.yanghe1al.com/indus....trial-aluminum-profi

Stripes are one of the first examples of woven textiles which continue to be seen in the fashion industry throughout history. While today you might consider stripes to be an endlessly classic style—patriotic, even—the design has origins which are less than favorable. In the middle ages, striped clothing began to be a sign of an outcast or someone who needed to be contained:
http://www.wespringco.com/shirt/stripe-shirt/

Before going over the difference between hook and loop, it’s important to note that what most people consider “Velcro” is a product called hook and loop. “Velcro” is a brand, called the Velcro Companies, and they are the original manufacturer of hook and loop fasteners.
http://www.quwinvelcro.com/hoo....k-and-loop/special-h

While it’s hard to match the natural beauty of solid wood, it’s an undeniably pricey option. Fortunately, for many projects, the two main substitutes—medium-density fiberboard (MDF) and plywood—are less expensive, yet perform just as well or better than solid wood for a wide range of projects, including furniture, cabinets, shelves, and decorative accents such as wainscoting. Still, choosing the right material—MDF vs. plywood—for your project can be a puzzle.
http://www.pxmaterials.com/mdf/plain-mdf/

Hook and loop fasteners consist of two distinct pieces. The rough, scratchy side is the hook because it is covered with several tiny hooks per square inch. Likewise, the soft, fuzzy side is the loop because it is covered with many small loops. The hooks engage the loops when the two sides are pressed together. This creates a bond that is exceptionally strong and allows for repeated use that lasts for thousands of cycles.
http://www.quwinvelcro.com/hoo....k-and-loop/adhesive-