2. Guangdong Liansu [China's well-known trademark, China's famous brand products, the national sales volume in 2009 was the first, and the pipeline industry was a miracle]
3. Debiao Pipe Industry [an internationally renowned brand, a famous brand in China, one of the top ten brands in Shanghai, and a pioneer in the pipeline industry]
4. Cai Zhong, Zhejiang [China well-known trademark, China famous brand products, listed group companies, well-known brand manufacturers in pipeline industry]
5. Luchuan, Sichuan [China well-known trademark, China famous brand product, joint venture group company, pioneer in pipeline industry]
6. Wei Xing, Zhejiang [China well-known trademark, China famous brand product, listed group company in 2009, pioneer in pipeline industry]
7. Shanghai Ai Kang-Poly [Shanghai famous brand, top ten best-selling brands in Shanghai, with large export volume and well-known manufacturers in pipeline industry]
8. Shanghai Sunpeak [Rifeng] [Shanghai famous trademark, famous trademark, the first batch of national green purchasing brands, "China famous trademark" audit, Shanghai five-star consumer enterprise, pioneer in pipeline industry]
9. Taurus and Rifeng [China famous trademark, China famous brand product, advertising investment manufacturer, pioneer in pipeline industry]
10. White disc [Shanghai famous brand, famous trademark, top ten brands in Shanghai, pioneer in pipeline industry]