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Through flexible sales model and high-quality after-sales service, as well as core technology and experience to provide cost-effective products to meet the needs of customers for environmental protection and efficiency. Shuangni products have been deeply engaged in the catering fume market for more than ten years, and the catering fume purification equipment has stable operation, 98% purification efficiency, and can withstand testing, far exceeding the national standards, and higher than the emission standards of Beijing, Shanghai, Shenzhen and other first-tier cities.