1, from the physical and chemical properties can be divided into inorganic materials (metal materials, inorganic non-metallic materials), organic materials and different types of materials composed of composite materials.
2, from the use of points, is divided into electronic materials, aerospace materials and nuclear materials, building materials, energy materials, biological materials.
3, the more common of the two classifications is the structural materials and functional materials: traditional materials and new materials.
Mechanical properties of structural materials is based on the force components to manufacture the materials used, of course, structural material for welding fabrication or chemical properties have certain requirements, such as gloss, thermal conductivity, radiation hardness, corrosion resistance, anti-oxidation. Materials are mainly using the material’s unique physical and chemical properties or biological functions such as the formation of a class of materials. A material are often both structural materials and functional materials such as iron, copper, aluminum and so on. Traditional materials are those that have matured and have been in mass production and a large number of industrial applications of materials such as steel, cement, plastics and so on. Such materials because of its large, high value, wide-ranging, but also the basis for many of the pillar industries, it is also known as basic materials. New materials (advanced materials) are those that are being developed, and has excellent performance and prospects of a class of materials. New materials and traditional materials, and no clear boundaries between the traditional material through the use of new technologies to improve the technical content, improve performance, a substantial increase in added value and become a new material; new material in over a long period after the production and application become the traditional materials. Traditional materials is the development of new materials and high-tech base, and new materials are often able to promote the further development of traditional materials.
4, according to site classification: that is to use parts of the material in space to the material classification, such as interior wall materials, wall materials, ceiling materials, floor materials. However, this points system established, we plastic mould a material can be used both indoors, you can also be used outdoors. In the interior, a material can be used both on the ground, walls, ceiling and can be used up, such as stone, paint, etc. If a stone attached to the ceiling, walls, floors, and some people might question the ownership of the material classification. From this, in order to distinguish the material only from the nature of the material and chemical composition up to the sub-points.
In 2009, the national implementation of “maintain growth, expand domestic demand, adjust structure, and benefit people’s livelihood” package of measures under the impetus of China’s building materials industry to overcome the adverse effects of the international financial crisis, the overall maintained a rapid growth, the main building materials production and sales growth picked up the price level bottomed, stable economic growth, investment enthusiasm building materials, structural adjustment to achieve new results. Building materials industry in 2009 manufacturing growth accelerated. Large-scale industrial added value in building materials industry increased by 15.1%, although an increase of 2.5 percentage points lower than the prior year, but last year’s fourth quarter and the first half, and compared the growth rate was smoke house accelerated. Output growth from the main building materials situation, the national output of 1.63 billion tons of cement, up 17.9% over the previous year to accelerate the growth rate 12.4 percentage points. Concrete, cement concrete pipes, poles, building and sanitary ceramics, plaster board, brick, waterproofing materials, refractories, cement, special equipment and other products are in more than 15% growth rate. Flat glass production starting from August, a substantial decline from the beginning to positive growth, the annual output of flat glass 560 million weight cases, an increase of 1.7%, an increase of 4.8 percentage points lower than the previous year. Strong sales of building materials market in 2009. Statistics scale building materials business sales output value increased by 21.5, lower than the 9.2 percent last year, but still high growth. The average sales rate of 97.35%, close to the prior year annual average. Building materials prices reversed the prior year decline since January l0 situation, the general level of prices of building materials throughout the year increased 0.6% year on year. The year the building materials industry 534.7 billion yuan in fixed assets investment, up 48.4%, an increase over the same period last year was essentially flat. Among them, the cement manufacturing investment amounted to 152.1 billion yuan to complete, an increase of 57.7%; glass 15.5 billion, an increase of 38.1%.
In this study, a large number of advisory report based on careful market research, mainly based on the National Statistics Bureau, Ministry of Commerce, the State General Administration of Customs, the State Council Development Research Center of China Building Materials Industry Association, the National Commercial Information Center, China travel steam iron Economic Monitoring Center, domestic and foreign journals and magazines basic information such as published materials and research units provide a lot of information, combined with our business of building-related field investigations, development status of China’s building materials industry and prospects, competitive landscape and market situation, profitability and corporate development, investment strategies and risk early warning, development trends and planning recommendations for in-depth study and analysis of the building materials industry focus on the prospects and risks. The report reveals the potential demand for building materials market and potential opportunities for strategic investors to choose the right investment opportunity and the company leadership to do strategic planning to provide accurate market intelligence and scientific basis for decision making, while the bank credit department also has a great reference value.
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Watch the production and production are based on a simple and witty inventions, it is a “spring”, it tightens and store energy, and energy is released slowly, in order to promote the operation of the device and watch in a pointer to show time function, the spring mechanism in the watch known as spring (Mainspring).
For most people, the watch is only for the time it, and quartz watch not only extremely accurate, and stable quality, reasonable price, no wonder quartz watch its widely acclaimed, become most people watch the choose and buy when the only choice. Many people don’t even know that watch also points quartz watch and mechanical watch! And mechanical watch need regular maintenance, maintenance also need to rigorous skill requirements, unlike quartz watch is almost a standard replacement parts just. However, why is still so DuoRen indulge in mechanical watch world? Not only spend a motorcycle or the money to buy a car, be DuoRen’t appreciate watch, even taken apart, studied the knowledge, watch, watch them day and night? In fact, really a lot of reasons, for everyone is endless also and same. We might as well from several different Angle discusses. Mechanical watch need maintenance is too much trouble, in the 21 st century also need maintenance watch? The world and gain and loss, just things change just doesn’t matter!!!!! This is the life reason. If we don’t take care of yourself, don’t eat not to drink, of course, and will die because of the starting point is to maintain life. Watch is a man-made, of course, also can’t from the earth’s survival rule. Man-made objects if can from such laws, really difficult to imagine, also is crazy. Watch natural follows the natural law ˉ including maintenance inside. And also because of mechanical watch have such and life and living similarity, many people to mechanical watch to produce a similar mutually cherish to feelings, or even treat their children or sweetheart’s feelings, natural and treat mass production quartz watch, damaged the feeling of abandonning differ greatly. Quartz watch does not need to rely on human, can on the dial, it turns the regular and human and no important interactive relationship. In this speaking, mechanical watch like inheritance human tabulation technology, tradition and culture, and the progeny of seed every Ping quartz watch just under a lot of industrial process product of icy cold of the objects just. Mechanical watch and wearer fuel transfer pump close relationship between rely on, it is very subtle. From a technical perspective, both have completely dependent on relationship, because no man wearing, mechanical watch couldn’t function turn. No matter whether or not, on the chain, the automatic wrist watch chain, from wearing the table in daily life every move gained momentum. Mechanical watch operation completely trust in humans. Such as time consuming to maintain your mechanical watch, you can take to see into the true feelings, love life is a kind of way, many mechanical watch fans are keen on this feeling, keen on maintenance. Of course, the wearer mechanical watch and there are other relationship between you and the relationship between the wrist watch, as you and your love car to the same!!!!! Hand than to be automatic gear transmission yet? Although automatic gear may be more practical, but I like hand because it will bring gear, I direct mechanical touch, the produce of the heart touched. Contact For example, one of the characteristics of mechanical watch is voice, a voice on chain card, each table core card by voice each have different interest. Delicate watch core, multi-function complex table, and the sound of the core and a sound card, more quiet than cheap table, more laws. Especially when you use hand chain, you will feel BiaoGuan and thumb and index fingers close contact between allows you to generate an unpredictable heart throb.