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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 ......
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......
GB/T 13201--91 Technical Method for Establishing Local Air Pollutant Emission Standards
GB/T 13201--91 Technical Method for Establishing Local Atmospheric Pollutant Emission Standards
This paper focuses on the technical method formulated in the standard of GB/T 13201--91, designed to establish local atmospheric pollutant emission standards. This standard specifies the steps and proc......
60WCrV7 use
The Purpose of Having a Passion
Passion is a strong feeling of intense excitement and enthusiasm, and it is something that everyone should have and strive for in their lives. Whether its for a hobby or a career, having a passion can help to lead a positive, productive and successful life.
First......
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