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bronze smelting technique in ancient China
Bronze Smelting Technique in Ancient China
Bronze smelting was one of the great achievements of ancient China. Between the 16th and 11th centuries BC, the art of bronze smelting was perfected. In this process, the ore was heated to a high temperature, resulting in an alloy of copper and tin tha......
1026 
Erin
flat crystal
Auxerre, France
Welcome to the official website of Auxerre in Burgandy, France. Auxerre is a city located in the north of Burgandy and is a city with a rich history; it is the capital of Yonne, holding a total population of 34,500 citizens. With beautiful surroundings and a very compact centre, A......
Spray Cooling Technology and Its Application
Spray Cooling Technology and Its Applications
Abstract
Spray cooling technology is a method in which water or other cooling liquid is sprayed in the form of droplets onto surfaces to be cooled. It has been used in many industrial applications to reduce the temperature of surfaces exposed to a ho......
GB 3095-1996 ambient air quality standard
3095-1996 Air Quality Standards
The air quality standards issued by the Chinese government in 1996, GB 3095-1996, are used to evaluate the air quality of various areas. The standards, also called air quality index standards, are designed to both protect human health and promote the environment.
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Characteristic Causes of Residual Shrinkage Cavity and Its Judgment and Treatment
Introduction
Remaining shrinkage hole is a common defect in castings, caused by a number of possible factors related to the manufacturing process. This paper attempts to thoroughly review the causes and prevention of remaining shrinkage hole defects in investment castings, and to discuss various ......
GB/T 707-1988 Dimensions, shape, weight and allowable deviation of hot-rolled channel steel
Hot Rolled Grooved Steel size, Shape, Weight and Tolerances
Hot rolled grooved steel is widely used in a variety of industries, including automotive, construction, engineering, manufacturing, and architecture. The finished product is valued for its strength and other properties, making it an essen......
product technical standards
Technical Standard of Product
Introduction
Technical standards are formalized sets of criteria or specifications. They are developed and adopted to help improve product quality, safety and environmental practice, reduce trade barriers, and encourage interchangeability and compatibility of relate......
WS/T Allowable Concentration of Hazardous Substances in the Air of Working Environment in my country and Occupational Exposure Biological Limits
Introduction
The air we breathe can have a great impact on our health. Since the industrial revolution, air quality has been declining due to the number of chemicals and other pollutants in the atmosphere. This is why there are regulations to control the maximum amount of toxins and other polluta......
Code for Building Structure Loads (GB50009-2001)
GB50009-2001 Building Structure Load Code
As the world increasingly looks to automate as much of its operations as possible, it is imperative that building structure loads be well monitored and enforced in accordance with the Chinese National Standard GB50009-2001 Building Structure Load Code. Th......
European Organization for Standardization
What is the European Standardization Organization (ESO)?
The European Standardization Organization (ESO) is an independent, non-profit, voluntary organization established in 1961 in Frankfurt am Main, Germany. Its members comprise major national and regional standardization organizations, industr......
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