Shandong rock mine drilling tools co., LTD-Rock mine
About us. Shandong rock mine drilling tools co., LTD. : Founded in 2002, located in yanggu county, shandong province, covering an area of 120 mu, the existing staff of 200 people, 30% of the bachelor's degree or above.They belong to Production and planning, quality inspection and comprehensive departments.Company main products: screw drill bit ...