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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......
1052 
Sophia
heat treatment of metals in ancient China
Heat Treatment of Metals in Ancient China
The history of heat treatment of metals in China dates back to the Shang Dynasty (1600-1046 BCE). This early heat treatment was used to soften and harden bronze utensils and weapons such as knives and spearheads, by heating and cooling in a process that i......
Numerical Simulation of the Computer Prediction Model of Cutting Force of Ball Nose Milling Cutter
Numerical Simulation of a Computer-Aided Model for Estimating the Cutting Force in Ball End Milling Process
Introduction
Computer numerical control (CNC) systems offer an efficient and cost-effective method of controlling machine tools which is why they have become increasingly popular in indust......
Special processing: EDM wire cutting
Electrical Discharge Machining (EDM), sometimes referred to as spark machining, spark eroding, burning, die sinking, or wire erosion, is a process of metal removal that defines a specific shape by actively melting away metal using a powerful electric spark. Electrical sparks cause material to be r......
Deep Processing of Two Bolt Holes of Connecting Rod of Air Compressor
Deep Machining of Two Bolts of a Reciprocating Compressor
Reciprocating compressors are important machines used in many industries, such as food processing, refrigeration and air conditioning, and material handling. They are composed of a series of components, including pistons, connecting rods, ......
Roll eddy current detection device and its adjustment method
Roller Vortex Flow Detection Device and Its Calibration Method
The pressure fluctuations of the working gas were analyzed by means of fast Fourier transformation, combined with vortex motion in the roll passes, and a device for online monitoring of vortex flow of rollers on the rolling mill was d......
GB 6681-86 General Rules for Sampling of Gas Chemical Products
General Principles of Gas Chemical Products Sampling GB 6681-86 “The General Principles for Gas Chemical Products Sampling” provides criteria for sampling variety of gas chemical products, as well as provisions and modeling diagrams of sampling device. This standard effectively protects the fair ......
JF2004 Coating Sand Sprinkler Operating Procedures
Operating procedure of JF2004 coating sand spraying Machine
1. Preparation before operation
(1) Before starting the coating sand spraying machine, carefully inspect the machine and check whether all related parts are in optimal condition and whether all fastening parts are tightened.
(2) Befor......
Controlled Rolling and Controlled Cooling Technology of SCM435 Alloy Wire Rod
Rolling and cooling process of SCM435 alloy bar
SCM435 alloy rods are commonly used in the automotive industry due to their good welding, machining and heat treatment properties. The rolling and cooling process of SCM435 alloy rod must meet the strict requirements of rolling and cooling condition......
GB 3531-1996 Designation and chemical composition of low-alloy steel plates for low-temperature pressure vessels
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Low alloy steel plates for pressure vessels operating at subzero temperatures are designated according to their chemical composition and mechanical properties. The grade of such steel plates, published by the Chinese national standards organization, can include Grades H480Y, H340Y, H420Y, H440Y,......
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