Beijing sunrole etern science and technology Co. Ltd. was established in 2007, has been engaged in the work of the rope core drilling industry drill pipe, drill, drill bits and accessories trade. China diamond drill and reamer in the international market for its high cost and shows a competitive advantage, but not all of the manufacturers could produce reliable diamond drill in China. Over the years, our company and dozens of domestic drill bit manufacturer are established extensive contacts with professional knowledge and honest attitude, are committed to building a trading platform the procurement quality drill for overseas customers to providing a reliable guarantee.