Search results for keyword: civilization
The Basic Principles and Policies of my country's Environmental Protection
Introduction
In recent years, environmental protection has become more and more important in China as the country continues to develop and pollution becomes an increasingly serious problem. In response to this issue, the Chinese government has implemented a number of important guidelines and poli......
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Hannah
Ordinary lathe
A lathe is a machine tool that rotates a workpiece about an axis of rotation to perform various operations such as cutting, sanding, drilling, or deformation with tools that are applied to the workpiece to create an object with symmetry about that axis. Lathes are commonly used to shape metal, woo......
Whetstone
Oil and Stone
Oil and stone are two natural resources that have been integral to the advancement of civilizations since the dawn of humanity. From ancient times, to modern industrial societies, these two indispensable materials have been used in everything from construction and fuel to transporta......
Hand Tools
Tools are important for us to create, fix, and build different objects. Through the history, tools were highly integrated into the daily life of the people. From stone age tools to recent-day high-tech tools, tools were always the most crucial factor for any kind of production and were considered ......
agricultural machinery
Agricultural Machinery
Agricultural machinery is a term used for machinery that is used on farms to assist with farming activities. Agricultural machinery has been an integral part of farming for many centuries, and has revolutionized the way farming is done today. Today, agricultural machinery i......
The most basic and practical machining knowledge (1)
Mechanical processing is a very important technology in modern production and life. It not only provides us with the support and conditions of a new era of civilization and culture, but also brings convenience and wealth to mankind.
In the process of machine processing, the first step of machine......
History of Machinery in Ancient China (Part 2)
The History of Ancient Chinese Machinery (Middle Ages)
The Middle Ages in Chinese history (589–960 AD) are known as the period of the Five Dynasties and Ten Kingdoms. During this era, the Chinese began to develop techniques for machine building and mechanical engineering that would later contrib......
contemporary history of mechanical engineering
内容
Introduction
Mechanical engineering is the application of physics, mathematics, and engineering principles to the manufacture, design, and operation of machines, tools and mechanical systems. It is one of the oldest and most versatile disciplines in engineering. While its core principles have......
Toothed wheels in ancient China
Toothed wheels have a long history in ancient China, with records of their use stretching back as far as 4000 BCE. For centuries, wooden and metal toothed wheels were used in a variety of ways, including in clocks and other mechanical devices, to measure time and carry out a range of functions.
......
Development of super clean bearing steel for special purpose
The Development of Special Purpose Ultra Clean Bearing Steel
Introduction
Steel has been an integral part of civilization for millennia, and its use in bearing components has become increasingly prevalent in the last several decades. As the use of bearing components expands, so too does the dema......
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