johnmin
you can try it,that might be helpful…
Wuxi Weishan Environmental Protection Technology Co., Ltd. is a high-tech enterprise certified by the state, headquartered in the advanced manufacturing cluster belt of Huishan District, Wuxi City, Jiangsu Province. As a pioneer in China's environmental ventilation system solutions, the company has established a full industry chain service system that integrates research and development design, intelligent manufacturing, engineering implementation, and operation and maintenance services, focusing on providing innovative solutions for industrial environmental governance and public space air quality management.