... And obtained the "National Key New Product" and "Technical departmentinnovation Fund".A number of patented technology makes this product ... , fast speed, stability control, low noise,simple,reliable, easy maintenance, flexible and mobile etc. The DS30 is made ... to drill diameter 32mm(1¼”) to 50mm(2”) holes. Technical Data Size600mm x 173mm x190mmweight30 kgPower7kwWorking pressure15 – 17.5MpaOil flow30 - ...