We started manufacturing industrial vacuum cleaners in 1991. I developed the first room vacuum cleaner in Korea. Our Clean Room vacuum cleaner has been recognized for its excellence and is currently being used by some of the leading In semiconductor, medical and pharmaceutical industries, many companies are using our Clean Room. You have achieved both KC certification and European CE, Chinese CCC, and Vietnamese CR certifications. This is the question we heard most frequently when we developed a cleanroom cleaner in 1991. Manager and users often assumed that because their cleanrooms were equipped with air filtration systems, cleaning procedures were optional or even unnecessary. Cleanrooms accumulate a lot of dust everyday due to complex causes. Both operators and manufacturing facilities cause pollution. Particles which are too small to be filtered also contaminatie the space. Small charged particles combine with other charged particles to form particles that are eventually large enough for human eyes to see. The operator is aware of the adverse effects that this dust can have on products produced in the cleanroom. In the end, maintaining the cleanliness of the cleanroom is directly linked to the stable production of the product and the high profits. Therefore, cleanroom cleaner must be used in the cleanroom. In the future, we will always try to find and use our Clean Room vacuum cleaner in more places.