•欧萨是中国市场领先的EHS检测公司，专业从事EHS检测与评价服务； Advanced EHS testing company in China, specialized in EHS testing and evaluation service. •欧萨为生产型企业提供国家法律法规和企业自身要求的环境保护、职业健康、室内空气质量、洁净室质量、食品和饮用水安全的检测和评价服务； Provide testing and evaluation service for manufacturing enterprises on environmental protection, occupational health, indoor air quality, clean room quality, food and drinking water safety as per their own requirement and national rules and regulations. •欧萨为非生产型的商业企业和居民提供公共场所卫生质量、集中通风中央空调卫生质量、室内空气质量、食品和饮用水安全的检测和评价服务； Provide testing and evaluation service for non-production commercial enterprises and residents on the quality of public health, sanitary quality of centralized ventilation air conditioner, indoor air quality, food and drinking water safety.