extrusion head

The conic extruding bit usually be put into use when adopting percussionrotaryextruding drilling method to drill.

在冲击回转挤压成孔的钻进中通常采用圆锥型的挤压钻头，这种钻头在松软地层中的钻进效率很高，但在高围压下的中、硬塑性地层中的钻进效率明显降低。

The Pore-forming Mechanism Study of Cam Bit on Percussive-Rotary Extruding DTH Drilling

凸轮型冲击回转挤压钻头成孔机理的研究

easing the bit in

钻头轻压慢转钻进地层

Penetration Mechanism of DTH Percussion Compact Drilling and Experimental Research on Compact Bit;

潜孔锤冲击挤密钻进机理及挤密钻头的设计与实验研究

tension-control cylinder

控制钻头给进的液压缸

Signal Processing of Near-Bit Weight on Bit and Torque

近钻头钻压、扭矩测量中微弱信号处理

The optimization design and experimental research on percussion-compact step drill bit

阶梯式冲击挤密钻头结构优化设计及试验

Influence of prebored hole measures on compacting effects of jacked piles

预钻孔措施对静压桩挤土效应的影响分析

Study on matrix performance of iron-based diamond bit and drilling tests

热压铁基金刚石钻头胎体性能及钻进试验研究

unit-type drill head

组合钻床钻头, 标准钻头

He ground his fist into his opponent's face.

他用拳头使劲地挤压对方的脸。

compensator protector

钻头压力补偿器的保护杯

Research on Optimization Design for Power Unit of Full-Driller

全液压车载钻机动力头优化设计研究

Research on Hydraulic Feed System for PDC Test Equipment

PDC钻头试验装置进给液压系统研究

hydrostatic extrusio

静水压挤压;静水压挤压;静液力挤压;静液力挤压;液力静挤压

a portable drill with a plate that is pressed against the chest to force the drill point into the work.

有一块可以把胸部压上来使钻头对准目标的金属板的手动钻机。

(5) The mammillary fluid can be found by palpate.

(5)摄片前触诊时的挤压可发现乳头溢液。

Magnesium Alloy Welding Wires Prepared by Hot-Extruded and Welding Performance;

热挤压法制备镁合金焊丝及其焊接接头分析

FEM Analysis on Warm Extrusion Concave Die of Drilling Bit Shell

凿岩钎头壳体温挤压凹模的有限元分析