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Computers in the Classroom
The rise of computer technology in classrooms over the past decade has produced both positive and negative effects. As computers have become more advanced and accessible, they have been implemented as an educational tool in a variety of ways. In order to maximize the ......
1048 
Hazel
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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GB 6653-94 Steel plates for welding gas cylinders
解析
GB 6653-94 Welding Cylinder Steel Plate
This standard GB 6653-94 provides requirements, test methods, inspection rules and packaging, marking, quality of welding steel plates for manufacturing various types of gas cylinders.
1. Scope
This standard applies to welded steel plates are used to......
material protection
Introduction
Material protection is an essential activity that needs to be conducted to protect our environment. We live in an era where more and more materials are produced, used, and discarded each day. These materials, such as plastics, metals, and other chemicals, can have an unnatural impact ......
Form rolling
Cold rolling is a steel forming process in which a metal bar is passed through a pair of rolls to reduce the thickness, increase the yield strength and increase the hardness of the metal bar. This type of metal forming process involves passing the metal bar between two rolls that rotate in opposit......
Characteristics of powder metallurgy oil-impregnated bearings
Powder Metallurgy Bearing Characteristics
Powder metallurgy bearings are capable of producing high precision and high strength products with uniform density and less porosity. Combining well-chosen lubricants with the structural characteristics of powder metallurgy bearings, such bearings can han......
Induction stove
Induction Cooktops
Induction cooking has been around for a long time, but with today’s modern amenities and advanced technology, induction cooktops are becoming increasingly popular. Induction cooktops are a type of stovetop or cooktop that uses induction technology to heat cookware to extreme t......
Production method of electrogalvanized steel sheet with high anti-blackening performance
Production Method of Electro-galvanized Steel Sheets with High Anti-blackening Property
Introduction
Electro-galvanizing steel is a kind of hot-dip galvanized steel, which can obtain high performance of anti-blackening rusting after surface treatment. It is widely used in the production of autom......
Welding Safety and Hygiene
Welding Safety and Health
Welding is a process used to join two pieces of metal or other materials through a high temperature flame or an electric arc. The resulting bond is strong and reliable, making it useful in many applications. However, a proficient welder must learn and understand the asso......
Spring steel (GB 1222-64) (1)
Spring Steel (GB 1222-64) (1) Introduction Spring steel is a special type of steel that is used in the production of springs and other related products. It is a high carbon steel with a tensile strength range of between 35 to 75 kg/mm². The main chemical elements that make up spring steel are mang......
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