Cement limestone mining process

China's cement limestone ore has a medium solidity coefficient (f=7-10), and the surrounding rock is usually soil, shale and other carbonate rocks.
The main links of the mining process: perforation, blasti

LED market bottoming: sales can not cost


As the sales of LEDs can't keep up with the changes in cost, the market in this area has been greatly constrained, which has caused a heavy blow in this market. This is the biggest bottleneck in the LED industry. Therefore, the discussion on improving the cost of LEDs has not stopped.