Search results for keyword: charges
GWPB 4-1999 Discharge Standard of Water Pollutants for Synthetic Ammonia Industry
GWPB 4-1999 Synthetic Ammonia Industry Water Pollutant Discharge Standard
The General Water Pollution Prevention and Control Board (GWPB) 4-1999 Synthetic Ammonia Industry Water Pollutant Discharge Standards is intended to address pollutants discharged from the synthetic ammonia industry, includi......
1023 
Emma
Settling terminal velocity
Settlement occurs in virtually all construction projects to some extent. The main causes of settlement can be subdivided into two categories: primary and secondary. Primary causes of settlement include each of the following: compression of organic soils, consolidation/creep of non-local materials,......
National standard for environmental testing of electrical and electronic products
Standard of Environmental Test for Electrical and Electronic Products
Today’s electrical and electronic products are extremely complex and continuously evolve in order to meet the demands of customers and the marketplace. Through exposure to extreme environmental conditions and the effects of na......
Technical parameters of WEDM (1)
Electric spark wire cutting machine
Electric spark wire cutting is a process of cutting materials that uses an electrically-conductive wire to cut shapes of metallic materials by means of spark discharges. It utilizes an electric spark wire cutting machine to deliver a high-powered electric curre......
Electric processing machine tools: electric spark strengthening machine
Electric spark strengthening machine
Electric spark strengthening is a process of Microstructural and hardness modification of surface layer to improve fatigue, corrosion and wear resistance of metallic components; and even to modify surface properties. The strengthening is achieved by subjecting......
Indirect cost quota for construction and installation projects
Civil engineering indirect material fee quota
In the field of civil engineering, indirect material fees refer to the amount of fees a civil engineer pays to the project in order to facilitate the construction process. Indirect material fees typically include construction materials, some labor cos......
Waste liquid treatment method of zinc phosphate phosphating treatment liquid
Treatment of Wastewater from Zinc Phosphate Chemical Conversion Coating
Abstract
This article will discuss the potential treatment options for wastewater effluents generated from the zinc phosphate chemical conversion coating process. The article begins by describing the zinc phosphate process a......
Basic knowledge of electroplating
What is electroplating?
Electroplating is a process that is used to coat a metal surface with a thin layer of another metal. The original metal that is being plated is called the substrate. The metal that is being applied is called the deposit.
The most common type of electroplating is galvanic ......
Plating solution treatment: activated carbon adsorption method
Treatment of Electroplating Effluents Using Activated Carbon Adsorption
Electroplating is a widely used process for depositing a layer of metal onto a surface, often to enhance resistance to corrosion or to change the electrically conductive properties of the surface. While electroplating is comm......
Plating solution treatment: ion exchange method
Treatment of Galvanizing Solution using Ion Exchange
Galvanizing is an electrochemical process by which a layer of zinc is plated onto a metal to protect it from corrosion. As part of the process, galvanizing solutions are used to add or remove ions from the metal surface in order to create a uni......
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