Sub Drill 代换练习法
Drill Tool Lifting Sub 钻具提升短节
command simulation drill sub-system 指挥模拟训练子系统
drill string bumper sub 钻柱减震器
Creating a drill-through report from department to sub-department level.
创建从部门钻通到子部门级的报告。
Pangolin also develop and produce a complete range of soil non-excavation drill, including Bit-oriented, sub-actuators, Drum-type Reamer, Flow-type Reamer, Plate-type Reamer, Adjustable joints.
我公司同样开发生产了规格齐全的土层非开挖钻具，包括导向钻头、分动器、筒式扩孔器、流道式扩孔器、板式扩孔器、变径接头等。
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