
Rubber rotary drilling hose - SlideShare
16/8/2017· As China’s first API authorized manufacturer of oilfield hoses, Jingbo has got the certifies of API Spec 7K-0376, API Spec 16C-0374, API Spec 16D-0109, API Spec Q1-2085 and API ISO9001-2008. Jingbo sets up advanced laboratory and is committed continuously to improving production technology. The development of new formula improves the production …