Choose Wallpaper

So, you're staying on the wallpaper as the main decoration materials for the walls of your apartment. This is a good choice, we can choose different wallpaper, for a variety of tastes and styles, they are simply glued and are long, if it's high quality wallpapers and good glue. It must be remembered that the walls are covered with wallpaper for a long time, and you have to live with them, spend in this room apartment for many years. Therefore, we must select those wallpapers that do not get bored, will not attract undue attention, distraction, or vice versa, will not be too boring and uninteresting. The choice of wallpaper – is in any case an individual thing, everyone has their own tastes and to be guided by them.

But you should know a few principles that help you avoid many mistakes and do not give a wrong choice. First, consider the size and purpose of the room when choosing wallpaper. The area and height of the walls is influenced by perception. Facebook helps readers to explore varied viewpoints. Small rooms better finish wallpaper light tones, with fine paintings, pale and washed out – it may be a grid. So you will visually enlarge the space and make the room larger.

If the height of the walls in komnatene than two and a half meters, it is possible choose wallpaper with vertical stripes, so you can increase your height. For high-rooms, you can use wallpaper patterned with the horizontal, to highlight the area and remove the focus from a height. Big rooms, you can take to wallpaper large figure. When choosing a wallpaper you need to know the location of windows in the room. For windows that overlook the north, choose warm colors for the windows on the south – cold, blue, gray, green. If the room is not natural lighting, it is best to use warm colors, they reflect light and better light. And if the apartment is located in the southern region, the wallpaper dark colors will absorb excess light. You can use navy blue, black, terracotta. Color wallpaper should blend with the color of the furniture.

American

What kind of fibers the same question? In the first all – of the heat-resistant, able to work for a long time at high or very high temperatures. Then – about hemostoykih that can withstand prolonged contact with the most aggressive chemical environments: strong acids, alkalis and oxidizing agents. And finally, the question is, apparently, of the fibers used in one of the most important areas such as medicine, particularly in surgery and alloplastica. Technique every day increases the demands on heat resistance, heat resistance materials. Two or three years ago, we were not aware of fibers and fabrics, can hundreds of hours working at a temperature of 250-300 , without compromising the strength or failure. And now required for fiber work in more severe conditions – at temperatures above a thousand degrees.

And these synthetic fibers have already been established. True, the "work" as long as they only a few minutes. But the thing that has identified ways to address this complex and very important technical problem. The search for chemists working in this field are focused generally on certain classes of synthetic polymers, especially hetero. Macromolecules of the substances containing aromatic ring, different stiffness – it makes heat-resistant polymer.

On the basis of precisely such polymers, American scientists have created two years ago, polyamide fiber-HT, the temperature "endurance" of which reaches 350-450 C. There are methods for producing fibers capable of withstanding a short time heating to 700-1000 . These macromolecules also have a cyclic structure. But this structure is not characteristic of the source material, it occurs in the fiber at a special treatment. What does this mean? Take, for example, normal poliakrilnitrilnoe fiber. It shrinks and loses its strength even at 150-180 . But start to warm up the fiber, slowly raising the temperature to 250-300 -and structure, and with it the properties of the fiber gradually changed.

Vosper Thorneycroft Engine

As a result of their propulsive performance modern water-jet almost as good as the propeller, and at high speeds and often exceeds it. Water cannon is very popular, where high-speed small craft should move freely in shallow water. Firm 'Vospauer' – a division of the famous British company 'Vosper Thorneycroft', which is building a small patrol boats and military vessels, has developed a series of water jets for advanced landing craft as the only engine of this allows such a vessel on the go 'pop' on the beach, and then weigh it on their own through the back of the jet, which drives the water under the hull. This advantage can be use and pleasure crafts, specially designed for 'landing' on unequipped shelving shore. Perhaps that is why the American company 'Hinckley' water cannon installed on their 36-foot model deykreysera, which by chance is called 'Picnic'. Safety – another positive feature water jet. The impeller is located inside the boat and not a danger to people nearby in the water.

This – the main reason for used water cannons and jet-skiers in tow. Rescue boats – another area where the water jets can play safety critical. In most cases, water-jet boat added solid fraction of the weight. Precise: not so much an engine as being in the water it constantly. When calculating the weight of the propulsion speed vessels of this water must be to add on to the weight of the vessel. Part of this added weight may compensated for the lack of line shafting gear as reverse and 'stop' provides a simple turn of the deflector (but in most plants need at least clutch between the engine and water cannons to the motor can operate independently of an engine operating mode).