Its main functions are maintaining borehole gage,improving drill string stability and protecting lower drill string from excessive wear.
其重要作用是保持钻头尺寸符合标准，提高钻杆稳定性，避免钻杆下部过于磨损。
out of gauge bit
尺寸不合标准的钻头
a bit with a cutting blade that can be adjusted to different sizes.
有可以调整的不同尺寸的钻头的切刃的钻头。
Size Reduction and NC Simulation of PDC Bit
PDC钻头的尺寸还原与数控加工仿真
Bolts with drilled or undersize heads shall not be used.
被钻孔或头部尺寸太小的螺栓不能使用。
he looked around for the right size bit.
他四周搜寻了一遍想找一根合适尺寸的钻头。
A projector is applied to inspect the drill geometry and dimensional accuracy.
例如钻头的几何形状及尺寸精度是以精密投影机检验。
Effects of Microstructure and Drill Geometry of High-speed Steel Drill's Using Life;
高速钢钻头微观组织和几何尺寸参数对使用寿命的影响
Influences of dimensional deviations on contact characteristics of threaded joint with double steps in drill collars
钻铤双台阶螺纹接头尺寸偏差对接触特性的影响
A twist drill is designed to drill a hole which has a particular size.
麻花钻用来钻削具有一定尺寸的孔。
Drill press. Dimensions and operating clearance area can be specified.
钻床。可以指定尺寸和操作净空面积。
Drill jig size calculation of the double inclined holes in the handle of YT 24 rock drill
YT24型凿岩机柄体双斜孔钻模尺寸计算
Parallel shank twist drills--Part 3: The types and dimesnions for parallel shank jobber series twist drills
直柄麻花钻第3部分:直柄麻花钻的型式和尺寸
Use to add an angular dimension with dimension arrows that point inward.
用于添加指向内部的尺寸箭头的角度尺寸。
Radial arm drilling machine. Dimensions and operating clearance area can be specified.
旋臂钻机。可以指定尺寸和操作净空面积。
Research and Design of Automatic Drilling and Riveting Machine for Large Thin-wall Workpiece Assembly
大尺寸薄壁工件自动钻铆机结构的研究与设计
Motor vehicles-Steering ball joints-Dimensions
GB/T13604-1992汽车转向球接头尺寸
Gib-head taper keys--Types and dimensions
GB/T1565-1979钩头楔键型式尺寸