Packaging & Containers
| Tue 22 Sep 2026
Beijing, Sept. 22 -- Hunan Hengkai Environmental Protection Tech Investment Co Ltd has obtained a patent for sludge tank capable of being automatically cleaned. This invention was developed by Zhang Qian, Zhang Yang, Wang Zigui, Long Yu, Zhang Saihui, Long Huayun, Lei Lei, Chen Guanghui, Li Wei, Liao Min, Long Xia, Wang Yijie an..