Search results for keyword: extinction
Flux for submerged arc welding of low alloy steel GB 12470-90
，标准不低于TOEFL阅读难度
Low Alloy Steel Arc Welding: Welding Agents
One of the most important reasons why steel is the most popular material used in the construction of industrial facilities is its ability to be combined and interrupted. This ability is made possible by welding, a process that u......
1047 
Sophia
Determination of physical properties of dust
Dust Physical Property Testing
Dust is an issue found in the environment of many industrial and commercial buildings. For example, dusty construction activities or dry processes that involve grinding, sanding or chipping may lead to raised dust levels. While dust is mostly associated with general......
water pollutant
Water Pollution
Water pollution is a critical issue that affects the health and wellbeing of humans, animals, and ecosystems. Water pollution occurs when toxic materials, such as oil, chemicals, industrial effluents, and sewage, enter our water supplies. These pollutants can cause serious health ......
Heavy metal pollution
Heavy Metal Pollution
Heavy metal pollution is a type of environmental pollution that is caused by the accumulation of hazardous heavy metals in soil and water. These metals are toxic to a variety of living organisms, causing health problems and damaging ecosystems. Heavy metals can be divided in......
late dam
Downstream Impacts of Dams
Dams are structures that are sometimes built within river systems to control the water flow and create a reservoir of water. This can be used to produce electricity, irrigate crops and control floods. On the surface, the impacts of dams are beneficial. However, careful ......
Environment, environmental quality, environmental quality parameters
Environment
The environment encompasses the physical and biotic components of the Earths environment with which humans interact. It includes the soil, water, rocks, flora, and fauna, as well as the air and the atmosphere, which is the major determinant of the quality of life. Human activities modi......
water turn
Environmental Crisis: The Need For Urgent Action
In the past few decades, Earth has seen a dramatic increase in the effects of human development on the environment. As the human population continues to grow, so too does our impact on the environment. We are altering the climate, polluting our riv......
GB50263-97 Specification for construction and acceptance of gas fire extinguishing system
Introduction
The construction and acceptance specification of the gas fire extinction system specified in GB50263-97 is an important national standard. This standard is formulated by the Ministry of Public Security Fire Protection Association.It is of great significance to promote the professiona......
GB J16-87 Code for fire protection design of buildings
The 2016-87 Chinese Architectural Design Fire Protection Code
The Design Fire Protection Code of China (the 2016-87 Chinese Architectural Design Fire Protection Code) sets forth national standards and requirements for fire protection in architectural design, so as to reduce fire losses, protect p......
GB 16670-1996 Performance requirements and test methods for cabinet type gas fire extinguishing devices
Cabinet-type Gas Extinguishing System Performance Requirements and Test Methods
Introduction
A cabinet-type gas extinguishing system, also known as a total flooding system, is a fire protection system that is effective for the protection of people, environment and property. A cabinet-type gas ex......
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