Rubber
| Sat 15 Aug 2026
Beijing, Aug. 15 -- Rizhao Chenhui Rubber and Plastic Product has been granted a patent for Blowout Preventer Rubber Core Production and Processing Tool. This invention was developed by Zhou Xiping, Wu Ziye, Zhou Xiaohui, Fang Xiangxing, Zhou Dewei, Wang Haibing, Zhu Chuanlei and Zhang Yonglei.
The patent application number is ..