on?Agents & Distributors Sales Network Global?Our Company?Established in 2007.optimal machinery is China the first one manufacture of HVLS industrial fan. Introduce the America High Volume ,Low Speed fan technology, Continuously innovate the HVLS fan technology.Research & development, Design, Manufacturing, Engineering, Sales, After sale service as one.?Asia's largest extra large cooling base, the headquarters covers an area of 10,000 square meters, more than 100 employees, with south, north