However, Kahn arrival Mechanical and Electrical Equipment (Shenzhen) Co., Ltd., the former Hong Kong and Ultrasonic Engineering Co., Ltd. original Shenzhen arrival, Ultrasonic Engineering Equipment Co., Ltd, the founder and Fanggu Dong Hong Kong, the joint strength, with operations in countries in Southeast Asia However, Kahn, Singapore, the new company created at the end of 2002. The purpose is to create and - DOA (Hong Kong) Limited to inherit "and" DOA "20 years of experience engaged in R & D and manufacturing of industrial cleaning equipment, is to further expand domestic and international markets, is again time to draw and to introduce the latest international, the most advanced industrial cleaning technology, but also to find a solution to the severe requirements of environmental protection on the cleaning industry forced the immediate, exclusive inheritance and has two well-known brand "three" and "DOA." Have more than three thousand new and old customers, the products have a wide range of applications in the auto, electrical and electronic, optical and optoelectronics, aerospace, metal machinery, watches and clocks, jewelry, metal products, chemical fiber, rubber and other industries. 
 The twenty-first century, the company once again the most advanced cleaning technology - vacuum cleaning technology of the carbonized water, prime the introduction of domestic produce in 2003 the first hydrocarbon vacuum cleaning equipment and products to the Chinese market, pushing to Southeast Asia and the world, which not only is the new contribution of the "arrival" of China's industrial, environmental protection - phase out ODS important contribution to the production of carbonation vacuum cleaning machine has more than 170 units, in addition to sold around the country. also exported to Japan, Singapore, Thailand, Malaysia, Vietnam and other countries.