When manufacturing PCB, the drill pin’s quality is an important factor to ensure the PCB’s eligibility.
在印制电路板制造过程中,钻针的质量对于保证所钻电路板的合格性起着非常重要的作用。
Research of diamond weak combined bit for high geo-stress stratum drilling;
弱包镶金刚石钻头在高地应力地层中的应用研究
Research into the new electroplating weak-holding diamond bits;
新型电镀弱包镶金刚石钻头研制
Research,development and application of the series core drilling bit for uranium exploration;
铀矿勘查岩心钻探系列钻头的研制、开发与应用
Research of the Edge Grinding with the Simplified Conical Drill;
简化钻头圆锥面刃磨法的研究
Dynamic Model of Drill during Vibrational Drilling;
振动钻削时钻头的动力学模型
A Forecasting System for Wear of Drill;
基于电流信号钻头磨损状态预报系统
Geared hydraulic motor design for drill bit of rotary well wall coring utensil;
旋转式井壁取芯器钻头的齿轮液压马达设计
Investigation in the direction controlling system of drill bit on horizontal auger;
套管螺旋钻机钻头控向系统的研究
The quantitative calculation of the forces between drill bit and formation is vital for drilling trajectory control.
定量计算钻头与地层之间的作用力对井眼轨迹控制具有重要意义。
In this paper,by testing and analyzing,it is showed that the performance of drill bits are influenced by various factors in the hot pressure sintering process of intermediate-frequency furnace.
通过试验和分析 ,说明在中频热压烧结金刚石钻头过程中 ,钻头性能受各种因素综合影响 ,其主要因素是电磁场影响到胎体粉料和金刚石分布 ,模具配合间隙引起胎体的流失而导致金刚石浓度发生变化。
Through the correspondence between the preferred targets for drill bits and the factors that affect the bit,a mathematical model is established.
针对目前钻头选型的常用方法,主要讨论邻井钻头优选算法,该算法根据邻井钻头使用数据,对钻头的优选指标与钻头在钻井过程中的影响因素之间的对应关系建立数学模型,利用最小二乘法预测出各种钻头的优选指标,选择其中满足优选条件的钻头型号的方法。
Research and Development of Drill' Quality Detection System
PCB数控钻床的钻针质量检测研究与开发
The Research of AOI System for Pin-Checking Based on Image Measurement;
基于图像检测的钻针光学自动检测系统研究
A Novel Method for Measurement of Micro-drill’s CWT
微型钻针内芯倒锥度测量新方法的研究
A needle-shaped drill for boring holes in rock or masonry.
钻头，钻石器，钻孔器用于在岩石或砖石上钻孔的针形钻
dowelling in the length, of coniferous wood
针叶树木板,经纵钻孔的
a brooch of diamonds mounted in silver
镶于银托上的钻石胸针.
diamond ,worked for styli, whether or not mountd
加工过的钻石,唱针用,无论是否装好
This diamond brooch is my most valuable piece of jewellery.
这个钻石胸针是我最贵重的一件珠宝。
A diamond clip was pinned to her dress.
一支钻石别针别在她的衣服上。
Did you see the diamond pin she got for Christmas?
你看到她为圣诞节买的钻石饰针了吗?
A diamond brooch, not large but dainty in design.
一个钻石胸针 不大 但设计得很精美。
My wife is asking for pin money, and the pin she want have eight diamond in it.
内子跟我要针线钱（零用钱），而她想买的那根针是镶有八粒钻石的呢。
My wife was asking for pin money, and the pin she wanted has eight diamond in it.
内人跟我要针线钱（零用钱），而她想买的那根针是镶有八粒钻石的呢。
She was at a loss when she lost her genuine diamond broach.
当她丢掉真的钻石别针时，茫然不知所措。
Characteristics research on drilled soft rocks and similar simulation of soft rock layer
针对钻进的软岩特性研究及软岩地层相似模拟
Aiming at the characteristics of bored cast-in-place pile, the paper concludes and summarizes the effective measures to enhance the bearing capacity of bored cast-in-place pile in soft soil ground.
该文针对钻孔灌注桩的特点，归纳和总结出软土地基提高钻孔灌注桩承载力的有效措施。
Aimed at some technological questions caused in the drilling of complex strata in coal field, especially in cenozoic strata carried out discussion.
针对煤田地层钻进中钻遇复杂地层特别是新生界地层时涉及的几点技术问题进行了探讨。
Guidelines concerning the Environment Related to Offshore Mining and Drilling within the Limits of National Jurisdiction
关于国家管辖范围内近海开采和钻探保护环境的指导方针