2024-10-23
In order to make the ZDY series drilling rigs and CMS series drilling rigs have the function of mechanical hole expansion, our company has designed a more convenient mobile hole making hydraulic device, which includes a mechanical coal seam hole making pressure relief device and a matching core rod jacking mechanical hole expander, core rod jacking hole making drill rod, and hydraulic thruster, which realizes rapid replacement in the tunnel, so that ordinary drilling rigs have the function of me
