Waste oil: 300 test methods enough?

Some officials of the Ministry of Health stated in public that none of the countries in the world have developed effective methods for the detection of waste oil, which is a "global problem." On the one hand, government departments are making great e

Four new trends in the LED industry


Recently, Guangzhou Lighting Exhibition and related forums were discovered. According to the latest trends, we believe that the fundamentals of the industry are still good, and we have been paying attention to several types of companies for a long time: 1) Sunshine and other application ma