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The cold air-conditioning year of 2021 is about to come to an end. Affected by the increase in raw material prices and energy efficiency levels, the average price of air-conditioning products has increased significantly in the first half of the year.…
Commodities rose collectively. It can be seen that although the prices of chemical products have fallen in the second quarter, overall, there is still a large increase in chemical products this year. With domestic efforts to cool down, international…
How to judge the 24040 bearing failure A sound meter is used to check the size and sound quality of the rolling sound of the 24040 bearing in operation. Even if the bearing is slightly damaged such as peeling, abnormal and irregular sounds will be em…
Amorphous graphite is usually formed by contact metamorphism of anthracite coal seams with metamorphic agents (e.g. tectonic stress, magma, etc.).…
GaN is a semiconductor material of third-generation with a large forbidden-band width. It has superior properties compared to first-generation Si, and second-generation GaAs. GaN devices, due to their high thermal conductivity and large band gaps, c…