ANHUY CONSTRUCTION VỚI KHOAN PRD – CÔNG NGHỆ VÀ ỨNG DỤNG 1. What is PRD technology? PRD stands for Percussion - Rotary - Drilling. So PRD technology can be described as creating a drill hole in a hard geological environment (rock) by the simultaneous use of a hammer head (bits) with artificial diamond particles that are both [...]

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