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History of Machinery in Ancient China (Part 2)
The History of Ancient Chinese Machinery (Middle Ages)
The Middle Ages in Chinese history (589–960 AD) are known as the period of the Five Dynasties and Ten Kingdoms. During this era, the Chinese began to develop techniques for machine building and mechanical engineering that would later contrib......
1038 
Sophie
Standard test method for torsion-tension relationship of threaded fasteners
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Metric screwed tightening-pulling relation test method standard
Introduction
The metric screwed tightening-pulling relation test method standard is used to determine the external friction generated by the thread screw connection, and the clamping force-pulling force law as a reference to deter......
Impact test
Impact Tests
An impact test is a type of accelerated stress test designed to determine a material’s toughness and its ability to absorb energy. It is a destructive test, meaning that it can cause permanent damage to the material being tested. Impact tests can be used to test elastomers, plastics......
single coordinate measuring machine
Theodolite is an essential equipment for surveying and mapping, and it is widely used in different fields. It is mainly used for measuring horizontal, vertical or slope distance and angle direction surveying of railway and highway engineering, geological engineering, building engineering and surve......
Precautions for installation and use of vent valve
Installation and usage notes for air valve
Air valves are industrial valves that open and pressurize the pipeline to obtain and maintain a required pressure during the production operation. The installation and use of air valves are the basis for ensuring that the equipment has a reasonable press......
Breathing valve introduction
Breather Valves
Breather valves are designed to manage air flow in pipe systems and pressure containers. They are installed to allow air to escape and enter the system while keeping pressure and liquid contents stable. Breather valves help to balance the internal foam pressure of tanks and proces......
Qualitative and quantitative analysis of chemical composition of plating bath
Qualitative and Quantitative Analysis of Bath CoatingChemical Components
Abstract
Bath coating as a special composite coating has been widely used in automobile, ship and other industries. In this paper, the physical and chemical characteristics of the bath coating were studied by means of the p......
Hastelloy trough test
A Step in the Right Direction: The Hausner Ratio
The Hausner Ratio is a particular method of measuring the fluidity of a material. It is most often used to measure powders and granular solids. This ratio is found by measuring the bulk density (LB) of a material and then dividing that by its tappe......
Discussion on Electromagnetic Stirring of Crystallizer
Introduction
Crystallizers are one of the most important pieces of equipment in laboratories and industrial processes. Crystallization is the process of separating molecules from a solution by turning them into solid crystals. Crystallization is used for pharmaceutical development, for food proce......
Effect of WC content on properties of iron-based valve seat materials
The Influence of WC Content on the Performance of Iron-based Valve Seat Materials
Abstract
This paper presents a study on the influence of WC content on the performance of iron-based valve seat materials. The microstructure, physical and chemical properties, and wear behavior of the valve seat m......
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