The American Automatic Precision Engineering Company (API Company) was founded by Dr. Kam Lau in 1987, based on his independent patented technology, with its headquarters located in Rockville, Maryland, USA. Since its establishment, API Company has been committed to the research, development, and production of precision measuring instruments and high-performance sensors in the field of mechanical manufacturing. Its products have been widely applied in advanced manufacturing fields in the United States and various countries around the world, and it leads in high-precision standards for coordinate measurement and machine tool performance testing. API Company boasts a team of experienced and outstanding engineers, continuously developing advanced innovative products to meet the needs of rapidly developing industrial technology. API Company has been an active participant and key technical partner in numerous projects of the US federal government, enterprises, and scientific research. The achievements it has made to date have earned it a high reputation in the international precision measurement field.