In the face of the problem of the general housing difficulties of the people in the country, the national government has always attached great im…
1. Nominal voltage UN
Corresponds to the rated voltage of the protected system; in the information technology system, this parameter indicates the type of protector that should be selected, and it marks the effective value of the AC voltage.
2. Rated voltage UC (maximum cont…
Corresponds to the rated voltage of the protected system; in the information technology system, this parameter indicates the type of protector that should be selected, and it marks the effective value of the AC voltage.
2. Rated voltage UC (maximum cont…
At present, the economically developed areas in the country and the areas south of the Yellow River have a mild climate, and most of them u…
Abstract According Mold & Metal & Plastic Industry Suppliers Association Executive Vice President and Secretary General Luo Baihui to express their views, to complete the next three years, China's machine tool industry re…
In the grinding operation with CBN diamond grinding wheel, in addition to the very important life of the grinding wheel, the understanding of the quality factors of the grinding wheel is also crucial in order to meet the high requirements for the grinding process and machining accuracy.
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"Opening a luxury car, living in a luxury house, having a driver, a babysitter and a secretary, having wealth and status, but why are you still not happy?" Zhu Tao turned a gorgeous turn and hit a beautiful curved ball in his heart. It seems that every time this small golf ball flies …
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On February 12, Premier Li Keqiang presided over the State Council executive meeting to study and deploy further efforts to strengthen air pollution control such as smog. In fact, in 2014, the local "two sessions" have been held one after another. The local "two sessions" ha…
Analysis and solution of liquid ring vacuum pump cavitation phenomenon Liquid ring vacuum pump (example: 2BV/2SK/2BE/SK), when working, at a certain temperature, when the liquid pressure at low pressure is lower than the vaporization pressure at that temperature (ie Saturat…
LED is used as a light source on lighting fixtures, but it has only been more than ten years, but it has achieved great development. At present, there are many kinds of LED lighting fixtures, including LE…
Vacuum pump selection, vacuum pump maintenance, vacuum pump manufacturers, vacuum pump working principle When using vacuum pump, you need to pay attention to the following items:
1. The working pressure of the vacuum pump should meet the ultimate vacuum and working pre…
According to the Russian "News Island" news network on February 16th, American scientists found that the insertion of nano-diamonds into contact lenses to deliver drugs is more conducive to the treatment of glaucoma.
According to relevant experts, by 2020, about 80 million pe…
According to relevant experts, by 2020, about 80 million pe…