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Category: History and culture

Ancient Persian Empire(II)


The Persian Empire arose in the ancient country of the Iranian Plateau. The Persians belonged to a branch of the Indo-European language family. They moved from Central Asia to the southwest of the Iranian Plateau (Fars region) in the late 2000s BC. There were ten tribes (six farming and four animal husbandry). Once under the rule of Medes. The word Persia has been used for centuries, mainly in the West, to indicate a region of southern Iran that was formerly known as “Persis” and “Parsa”.Click Here For More.

During the Elam and Medes period (2700-550 years ago), Elam and Midi were not called Persia by Greeks, but they were an indispensable part of the history of the Persian region. The Medes, who belong to the Indo-European language family with Persians, settled in the northwest of the Iranian Plateau. The Persians came to the Iranian Plateau with the Medes. They settled in the southwestern part of the Iranian Plateau near the Persian Gulf. The Persians had ten tribes, six of which were engaged in agriculture and four in animal husbandry.


Ancient Persia is a typical example of the eastern autocracy. During the Empire period, slavery economy in Western Asia was further developed. Persian culture was mostly influenced by the culture of the Mesopotamia, using cuneiform characters, and plastic arts had higher achievements. The founders of the Persian Empire easily unified the Levant region politically within 25 years (about 550-525 B.C.) and took vigorous measures to achieve the peace and order it desperately needed.

The Ten Mysterious Historical Monuments in the World (IV)


It is generally believed that the Sphinx in ancient Egypt was used to guard the Pharaoh’s cemetery. It is a combination of wisdom and bravery, but some people have different understandings. This man is the great prophet of the United States, Edgar Casey. He began to predict again and again in 1933 that the Sphinx was not built by the ancient Egyptians, but came over from Daxizhou 10,000 years ago. Built by the Atlanteans.

When the Sphinx was more and more mysterious because of the increasingly diverse views of people, Edgar Casey, the American great prophet who was known for his accurate predictions, came out to announce his research: the Sphinx is not ancient. The Egyptians built it, but they were built by Atlantis who came from Daxizhou 10,000 years ago. This view came out, leading to an uproar, which invisibly added another aura to the statue. American scholars also found that in addition to the head, the entire lion body was flooded. According to historical records, Egypt has been plagued by seawater and the Nile River floods many times. The last major flood occurred around 10,000 BC. From this it can be inferred that if the Sphinx is exposed to water, it must have been built before the flood. According to this statement, the Sphinx should be built 10,000 years before BC.

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6.Underwater sites in Japan

More than 20 years ago, a diver accidentally discovered an ancient ruin on the seabed of Japan and Nagano Island. These sites seem to have a history of 8,000 years, and many people initially thought that these sites were just the geographical structure of water carving. The building has carved signs at the bottom, and after underwater exploration, it is proven to be artificial. The most striking clue is the way these steps are formed, and it is clear that the flow cannot form steps.



The Tiahuanaco site is a Bolivian Indian ancient cultural site. The original ancient city was built on the edge of the lake. Later, as the lake gradually receded, the site now found is 20 kilometers away from the lake. The Tiawanaco site is made up of megaliths weighing tens of tons or even hundreds of tons.

The Puerta del Sol is the most famous monument in the Tiawanaco ruins. It is carved from a monolith weighing about 10 tons. It is 3.84 meters wide, 2.73 meters high and 0.5 meters thick. During the summer solstice, the sun rises exactly along the central axis of the doorway, reflecting the rich astronomical knowledge of the Indians. The Puerta del Sol is one of the most famous monuments of ancient America and is an outstanding example of the culture of Tiwanaku.

The Acapana Pyramid is the largest building in the site. The bottom of the tower is rectangular in shape and is 180 meters long. The tower was built with the help of a small hill with stone blocks on the outer layer. There are several different forms of architectural relics on the top of the tower. There is also a building similar to an underground reservoir.

Cutters Edge Blades For Rotary Saws

However, these are not the diamonds found in engagement rings – thank goodness. They are typically synthetic and produced through high-pressure, high-temperature synthesis in order to produce the most efficiency for cutting. The bond varies between different levels of softness and hardness, and in addition to giving a base for the diamonds, the bond allows for a specific wear rate to match the material being cut. We added this section to the article after reader posed the question of when to use segmented blades versus continuous rim blades. The answer is that it depends a number of variables, including the material being cut, the speed of the cut, the finish quality, and availability of water. These areas serve important functions—namely, heat dissipation and debris removal. Continuous rim blades are wet cutting blades that operate very slowly but provide the cleanest cuts. This is important when working with very brittle materials or when the cut edge will be exposed. Both blades are suitable for cutting concrete, masonry, pavers and the like.

As well as Military, Science & Space Organizations, and Small Machine Shops. Precision Diamond Blades are available from inventory in many different specifications, diamond concentrations, mesh sizes, bond hardness, & inside diameters. We will work with you to determine your needs, and recommend the right parameters for your specific material/application. We offer almost everything that you need to do your job- including saws, high-visibility gear, safety equipment, ergonomic supports, even tool bags. Desert Diamond Industries offers the onlyLife Time Operator Error Warranty™in the diamond blade industry. It protects you against operator damagefor the life of the diamond blade, grinder or core bit. Blades get dropped, broken, run over, bound up in cuts, even blown up. You can’t avoid these accidents, and we don’t think you should be left holding the bag when they happen. There are three basic types of saw blades, notched rim, sintered rim, and segmented rim. In the past, the notched rim blades were the most common blades one would encounter.

So the basic concept of sharpening diamond saw blades factory is to run them through some sort of material to abrade that metal away while leaving the diamonds themselves as intact as possible. There are a few different options for what can be used to dress the blade depending on how committed you are to ensuring a long blade life. The sharpening process of carbide saw blade is different from that of the conventional circular saw blade. This not only makes the carbide saw blade crack but also the sharpening quality is not good. Therefore, when choosing the grinding wheel, it should be chosen the professional diamond grinding wheels for sharpening carbide saw blade. It not only affects the quality of carbide saw blade machining, but also increases the cost.

If you’re sawing decorative pattern lines in concrete, dry-cutting blades are often the best choice for making crisp, clean cuts . These decorative cuts are typically only 1/16 to 1/4 inch deep and do not function as control joints. Barranca Diamond BD-301 Supreme Lapidary Blades provide superior cutting performance for hard materials such as agate, petrified wood or jade. Blades using diamonds embedded in a metal coating, typically of nickel electroplated onto a steel blade base, can be made to be very thin—blades can be tens of micrometres thick, for use in precise cuttings. Diamond blades designed for specific uses include marble, granite, concrete, asphalt, masonry, and gem-cutting blades. Depending on the material being cut, a different combination of abrasive size, concentration and bond strength is needed. Buehler has developed blades for specific applications to ensure a high quality result is achieved. The selection table on the “Ordering” tab provides a recommended blade by application. Hard edge flexible back recommended for straight and contour cutting of wood, flake board, plastic and nonferrous materials. Absence of raker teeth gives a third more cutting edge for additional blade life and abrasion resistance.

The higher the grinding speed, the higher the grinding heat, the easier the tooth edge burns. The higher the feed speed, the larger the grinding heat and residual stress of the tool, the larger the wear loss of the grinding wheel. To minimize the number of abrasive grains falling off and improve the surface grinding quality, it should reduce the feed speed. The grinding depth is 0.01-0.05mm in rough grinding and the feed speed is 1-2 m/min. After sharpening the carbide saw blade, the angle between the front and rear keep unchanged. The included angle between the working face of the diamond grinding wheel and the front and back teeth of the required grinding face is equal to the grinding angle. The movement distance of the diamond grinding wheel is equal to stock removal. China diamond blade is world famous for good quality and lower price.

Fire departments require blades to be made with a very large diamond grit, to tear through material quickly. Metal-cutting diamond saw blades have a diamond-embedded rim that provides a sharp, hard edge for cutting hard metal alloys. The use of diamond saw blades in the concrete industry allows for greater precision and excellent output. Used in conjunction with highly capable concrete saws and other advanced machinery, diamond blades make for a superb finish that ensures a job well done for all parties. Glass band saws let you make tight cuts that would be impossible with a simple glass cutter. Find top quality band saws, diamond coated blades, replacement parts and more here. NIABRAZE’s continuous diamond circular saw blades feature a seamless diamond coating around the entire circumference of the blade. Diamond encapsulation is approximately 50% to ensure proper adhesion of the diamonds, while still having 50% of the crystal exposed for cutting.

Diamond blades and CBN cutting blades are the preferred blade type when delicate and precise sectioning is needed. Diamond and CBN blades also perform better than traditional abrasive blades when cutting certain materials, especially very hard materials. Masonry-cutting diamond saw blades cut through abrasive materials such as brick, cinderblock, and other materials not as hard as cured concrete. Concrete and asphalt-cutting diamond saw blades cut fresh or cured concrete and other hard and abrasive materials. Extend the life of your diamond coated saw blades and grinding bits with this dressing stone. Product DescriptionExtend the life of your diamond coated saw blades and grinding bits with this dressing stone. The Vari-Cut range of diamond blades is our intermediate or Silver category. This category is ideal for general contractors and is developed for professional use in all-round applications.

You will find that these polishing pads stuck with diamonds on it are ideal for polishing a granite surface. Let’s understand how you polish granite structures using a diamond sanding discs. Available in different sizes our diamond polishing pads can be easily attached to a number of different machines for greater convenience and usability. Resin bonded floor diamond polishing pad price is a floor polishing tool used after using metal bonded diamond tool, diamond Grain sizes range from 50#-3000#, the larger the grain number, the finer the effect. The diamond encrusted Series 40 burnishing, polishing and maintenance pads are designed for durability and longevity for a wide variety of applications. The flooring tools are diamond coated throughout the entire pad creating a stronger, wear and tear resistant pad at an economical price.

Also good for taking the sharp edges off glass, ceramic and porcelain. The 50# through 400# pads are electroplated diamond The 800# through 3000# are resin bonded diamond. Weha 3 Step Hybrid Diamond Polishing Pads is a new technology of wet/dry diamond polishing pads. The Weha 3 Step Diamond Polishing Pads are primarily made to be run wet. However for job touch ups, onsite repairs on an area that wasn’t polished in the shop, the Weha 3 Step Hybrid Pads will create an outstanding polish when used dry on granite, marble, concrete. Shop N Save Mart is a renowned industrial diamond tools supply company and the authorized retailer for Stadea tools. for wet and dry granite polishing, in sizes 4 inch, 5 inch, 6 inch diamond pads. The available grits are 50, 100, 200, 400, 800, 1500, 3000, 6000, Buff. Find more information on stone polishing pads, and marble polishing pads. resin pads perform all the tasks while leaving an amazing polish on the stone.

The Culture of Elizabeth Tower

The Elizabeth Tower was designed by Augustus Welby Northmore Pugin and was built by Edward Dent and his son Frederick. The Elizabeth Tower was installed on the clock tower in 1859. The Elizabeth Tower is the second largest clock in the world that faces four directions. The inscription on each of the clock faces is engraved with a Latin inscription. “God, please bless the safety of our Queen Victoria I.”

The clock weighs 13.5 tons and the dial has a diameter of 7 meters. The hour and minute pointer are 2.75 meters and 4.27 meters respectively, and the pendulum weighs 305 kilograms. The Elizabeth Tower is a bell tower in the north of the Houses of Parliament in London, England. The Elizabeth Tower is famous for its accuracy and its huge 13-ton bronze clock for timekeeping.

Clock tower

Known as the “Big Ben”, the “Clock Tower” is located on the banks of the River Thames. It was built in 1859 and is 96 meters high. It is part of the British Parliament building. This 96-meter-tall tower, built in 1859, is surrounded by four gold-plated clocks. The name of the tower depends on the giant clock that placed in it – Big Ben. “Big Ben” has 393 steps from the bottom of the tower to the top of the tower. Conservative Party leader Cameron, Liberal Democrat leader Craig and Labor Party leader Miliband took the lead in supporting the name change proposal, arguing that this was the appropriate way to pay tribute to the Queen. The bill caused a lot of controversy on Twitter. Many people began to mistakenly think that the name of “Big Ben” was changed, but in fact it was renamed the clock tower where “Big Ben” is located.

Big Ben’s timekeeping is strictly regulated by a stack of coins placed on the huge pendulum. Big Ben has rarely stopped. Even after a bomb destroyed the Commons chamber during the Second World War, the clock tower survived and Big Ben continued to strike the hours. The tower in Westminster, which houses the giant bell known as Big Ben, is sinking into the banks of the Thames, partly as a result of decades of underground excavation. Big Ben is equipped with a microphone and is connected to the British Broadcasting Corporation (BBC), so every time the big clock is reported, people can hear their powerful voice from the BBC’s broadcast.

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