查询词典 practice drill

Through analyzing the s tressed state of each part of the drill string in borehole,the four main charact eristics and basic reasons of the drill string failure that often occurs and is of general character are analyzed and the feasible,scientific and effective meas ures for preventing these common drill string failure accidents are emphatically proposed in this paper.

文章从分析钻具在使用过程中的受力情况出发，根据钻柱各部位在井内的受力情况，剖析了四种经常发生的、带共性的钻柱失效的主要特征及根本原因，重点提出了比较可行的、科学的预防这几种常发性钻具失效事故的有效措施和看法。

Although it is customary to put these brushes into a hand-held electric drill motor or a speed controlled air drill, they might also be used in drill presses.

通常扭丝型刷子被用于手提便携式电钻或转速一定的风钻，同时它也可在钻床上使用。

The model test of drill auger boring into cement soil can easily and intuitively realize the optimization of the drill auger, and provide the basis for designing the optimized drill with least torque.

螺旋挤扩钻头钻进成孔模型试验可以方便、直观地定性实现螺旋挤扩钻头的初步优化工作，为选择所需成孔扭矩最小的最优短螺旋挤扩钻头提供设计依据。

Drill machine to be placed in a center position in drill explore the equipments, All of other equipmentses is to drill the machine equipment around.

钻机在钻探设备中处于中心地位，其他设备都是围绕钻机配备的。

In the commonly used positive cycle of drilling, the mud pump is to rinse the surface with water medium ─﹑ mud or polymer washing fluid at a certain pressure, through the high-pressure hose taps and drill column ﹑ center hole in the bottom of the direct-drill in order to achieve Cooling ﹑ be cutting down the drill cuttings removal and transport to the surface purpose.

在常用的正循环钻探中﹐泥浆泵是将地表冲洗介质─清水﹑泥浆或聚合物冲洗液在一定的压力下﹐经过高压软管﹑水龙头及钻杆柱中心孔直送钻头的底端﹐以达到冷却钻头﹑将切削下来的岩屑清除并输送到地表的目的。

This company mainly produces the overall quality hard alloy milling cutter, drill, reamer, center drill, graver, Ling-tooth milling cutter, dovetail milling cutter, ladder drill, PCD insert carbide cutting tools and various non-standard cutting tools such as Product mainly used in molds, models, Auto, aviation, electronics, advertisement production, woodworking furniture and other industries.

本公司主要生产整体硬质质合金铣刀，钻头，铰刀，中心钻，雕刻刀，菱齿铣刀，燕尾铣刀，阶梯钻，PCD刀具及各类镶硬质合金非标刀具等，产品主要应用于模具，模型，汽摩，航空，电子，广告制作，木工家具等行业。

Blue ribbon diamond drill bit accessories factory network solid name: Domestically produced diamond drill bit; General website: The domestically produced diamond drill bit ( www.blueribbon888.cn is one produces the research and development, the management sale is a body's company.

蓝绶带水钻饰品厂网络实名：国产水钻；通用网址：国产水钻( www.blueribbon888.cn 是一家生产研发、经营销售为一体的公司。

Blue colorful silk ribbon diamond drill bit accessories factory network solid name: Domestically produced diamond drill bit; General website: The domestically produced diamond drill bit ( www.blueribbon888.cn is one produces the research and development, the management sale is a body's company.

蓝绶带水钻饰品厂网络实名：国产水钻；通用网址：国产水钻( www.blueribbon888.cn 是一家生产研发、经营销售为一体的公司。

The machine equipments needed has spiral drill press and drill to expand machine or diving drill press.

所需机械设备有螺旋钻孔机、钻扩机或潜水钻孔机。

In Fig.1,spindle A is supported by two identical isotropic bearings in radial direction;spindle A and drill clamp C–D is connected by shaft B;micro-drill E–F is fixed in the clamp D.Drill part with the screw slots is taken as uniform shaft F by equivalent of the bending stiffness.

In ，主轴A是帮助的两个相仿的各向同性轴承径向目标；主轴A和操演钳的C - D的贯串轴B组；微型钻电子F是牢固在钳4钻局部螺钉插槽是采用调和轴F很是卷曲stiffness。

The system can be widely used in belt weighing and batching process control,etc.

介绍了基于智能模糊控制的嵌入式配料系统的设计方法，对模糊PID控制过程和系统调零作了重点的讨论，同时给出了PID控制的程序流程图和系统定长调零子程序。

"I dunno," she answered,"but if you show me aroun', I'll recognize it from the lighthouse just outside the porthole."

"我不知道，"她回答说，"如果你能带我转转，我能认出来的，因为灯塔就在舷窗外。"