In May and June of this year, we did a PV industry survey. In this survey, we conducted research on nine key PV companies, interviewed several experts and scholars, and visited relevant important institutions. We want to do our best to understand the current situation of the current PV indus…

Editor's Note: Experts interpret the importance of textile cotton blending for textile production, introduce traditional textile blending methods and related indicators of HVI, and use modern computerized cotton blending system to select better cotton blending sc…

According to the Central Meteorological Observatory, from the night of the 19th to the 21st, there will be an obvious rainfall weather process in Jiangnan, South China and Guizhou. Among them, southeastern Guizhou, southern Hunan, south central Jiangxi, southern Zhejiang, Fujian, easter…

In recent years, with the development of the mold manufacturing industry, the requirements of the mold component materials themselves have increased, and superhard tool materials such as CBN (cubic boron nitride), PCD (polycrystalline diamond) tools and new cemented carbide tools have been w…

Using biological pesticides to control diseases, the specific practices are as follows:

1, pyrimethanil + Difenoconazole yl or mixed phenol ether, of gray mold and powdery mildew, scab, etc. are control effect;

2, downy mildew hy…

[China Aluminum Network] Most of the raw materials of the recycled aluminum production enterprises are scraps of aluminum and aluminum alloys recovered through circulation. These wastes come from complex sources and come in different shapes, often with some other metals and non-metals. The …

Centrifugal pump in the world tends to become more and more large. Although more than 10 supercentrifugal pumps have been put into operation, in the next 4 years, 155 super-million boxes of centrifugal pumps will be put into operation one after another. Some foreign experts believe that by 2010…

First, the role of power station boiler safety valve and features Safety valve is an important annex to the boiler, when the boiler pressure vessels (such as drums, superheater, reheater, etc.) and the pipeline pressure, exceeding the normal, and to take off pressure The valve opens automatical…