Perforadora pozos dth underground drill rigs and diesel electric Bolter Drilling Rig Machine forme de forage mine drilling rig Model Number:HW920-1 77777777777777px

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Perforadora pozos dth underground drill rigs and diesel electric Bolter Drilling Rig Machine forme de forage mine drilling rig Model Number:HW920-1 77777777777777pxPerforadora pozos dth underground drill rigs and diesel electric Bolter Drilling Rig Machine forme de forage mine drilling rig Product Description HW 420 is equipped with a dual motor rotary head and a multi way valve with adjustable rotary speed. The rotary torque can reach 2200N. m, which meets the needs of 76 drill pipes and 130 bores. The rotation speed can reach up to 150 revolutions, which meets the needs of some customers for high speed