Sanitation
| Wed 14 Oct 2026
Beijing, Oct. 14 -- Gansu Wandejia Tech Co Ltd has received a patent for Light Steel Environment-friendly Pit Toilet Capable of Guaranteeing Ventilation and Deodorization Effects. This invention was developed by Wang Jianhong, Bai Danfeng, Zhang Zhaobo, Lei Zaocheng, He Yanjun, Wang Xu, Fan Xiurong, Yang Lijuan, Zhang Jiangnan, ..