Natural gold (Gold)

Au [Chemical composition] There are often Ag-type homologous substitutions of Au in the composition, and both can form a complete class of the same image. In the ingredients When the content of Ag<5% is called natural gold ; when Ag is 5%~15%, it is called silver natural gold; 15%~50% is called ...read more...

2017 LED Lighting Cooling Components Industry Market Analysi…

As a structural component of electronic products, heat sinks cover a wide range of applications, including consumer electronics, servers, medical devices, electric energy, transportation, LED lighting products, etc., which may involve the use of heat sinks. The market for electronic products has a h ...read more...

Desktop dispensing machine how to accurately control the glu…

Introduction: Desktop dispensers are widely used in manufacturing companies. During the use of equipment, precise control of adhesives and solving glue bubble problems are needed to reduce the defective rate. The quantification of glue is very important. Then the dispensing machine is very ...read more...

Vertical deep hole spherical drug pack mining stage mining m…

Vertical ore-hole spherical drug pack mining stage mining block mining and cutting engineering arrangement, see Figure 1. Figure 1 VCR mining method diagram 1-rock drilling chamber; 2-mine body; 3-transport lane; 4-Ñ„165mm deep hole; 5-mining roadway; 6-pull space In the lower part of the min ...read more...

· Nexans tires signed a memorandum of understanding with Mu…

Nexen Tire, the world's leading tire manufacturer, and Mubadala Investment Company (Mubadala), a strategic investment fund of Abu Dhabi, today signed a memorandum of understanding to find Strategic cooperation opportunities. Under the agreement, Mubadala has made direct investments in Nexans ty ...read more...

Nonlinear Dynamics Modeling and Dynamic Load Study of Star G…

1 At present, domestic and foreign scholars have done a lot of research on the dynamic characteristics of planetary and star gear transmissions. For the planetary gear train and the star train, a linear model including eccentricity error and time-varying mesh stiffness is used; equivalent mass; Ms, ...read more...

Mining work of stage mining method

When using the stage mining method of horizontal deep hole ore mining, if medium-deep hole ore is used, the rock drilling and blasting work is carried out on the platform and the hanging plate in the rock drilling patio. The minimum resistance line is 1.6~2m. In order to avoid the secondary crushing ...read more...