Nghĩa của từ rotary drill bằng Tiếng Việt
@Chuyên ngành kỹ thuật
-mũi khoan xoay
@Lĩnh vực: xây dựng
-máy khoan kiểu xoay
-mũi khoan quay
-sự khoan xoay
Đặt câu có từ "rotary drill"
1. Drilling consisted of two rotary drill holes and three reverse circulation airblast and under-ream (RCA/UR) drill holes.
2. A system for steering the direction of a borehole advanced by cutting action of a rotary drill bit by periodically varying the rotation speed of the drill bit.
3. An improved method and apparatus for automatically controlling the direction of advanced of a rotary drill (30) to produce a borehole profile substantially as preplanned with minimal curvature while maintaining optimum drilling performance.