查询词典 drill bow

The results show that with the increase of drill wears, the box dimension and the information dimension as well as the correlation dimension of drilling force signals appear obviously to have the downtrends. Accordingly, this characteristic can be effectively used to realize the monitoring of drill wears.Aiming at the characteristics of the highest overlap of the feature modes in each drill wear condition, the hidden Markov model is put forward to resolve the drill wear monitoring.

针对各钻头磨损状态下特征模式高度重叠的特点，提出采用隐马尔可夫模型HMM解决钻头磨损监测的思想，对1肠IM在钻头磨损监测中的原理及实现方法进行了系统的研究，完成了基于前后向算法和Baurn一Welch算法进行模型训练和识别的具体实施步骤，建立了基于S服网络的矢量量化器，解决了钻削力特征矢量的融合与编码问题。

The key to preve n tion and reduction of the drill string failure lies in prevention.For this reaso n,in view of the different stressed characteristics of the different sections of the drill string in borehole,the research is conducted by dividing the drill st ring into four failure sections,namely,the section at the wellhead and the secti ons at the upper part,vicinity and lower part of the zero stress point,to inves tigate the essence and basic reason of the failure,and to put forward scientific and feasible preventing measures,thus,being advantageous to complete and system atic prevention and forecast of the drill string failure.

防止和减少钻具失效，关键在预防，为此，根据钻柱各部分在井内的受力特点不同将其划分为钻柱井口处、零应力点上部、零应力点附近、零应力点下部四个钻具失效段进行研究，查出其失效的实质及根本原因，提出科学可行的防范措施，有利于全面系统地预防预测钻具失效。

The main products: geological accessories; drill, drill gear; mud pump, mud pump accessories; and drill pipe, joint locks, consisting mainly of drilling materials, to pull the drill pipe, casing pliers, Bocha, consisting mainly of drilling pad fork Tools; series of geological accessories ......

主要产品：地质配件；钻机，钻机齿轮；泥浆泵，泥浆泵配件；和以钻杆，锁接头，为主的钻探材料；以钻杆钳子，套管钳子，拨叉，垫叉为主的钻探工具；等系列地质配件。。。。。。

Specifications Carbide Tool: milling cutter, Reamer, drill, drill centering, the ladder drill, drill Huo, an agent: an agent of Israel ISCAR Tool: OSG Tap Japan, Japan's Mitsubishi , An agent: ISCAR, SHOWA, NIKKEN processing center knife handle the Taiwan ANNWAY processing center knife handle a variety of imports TIALN coating alloy cutter (HRC72)-made: forming tools, complex tools, such as Non-standard alloy tool.

各种规格硬质合金刀具：立铣刀，铰刀，钻头，定心钻，阶梯钻，锪钻，·一级代理：以色列ISCAR刀具·一级代理：日本OSG丝锥，日本三菱，，·一级代理：ISCAR，SHOWA，NIKKEN加工中心刀柄·台湾ANNWAY加工中心刀柄·各种规格进口TIALN涂层合金铣刀(HRC72)·订做：成型刀具，复合刀具，等各种非标合金刀具。

The company range of products and services include: self-and agent all kinds of domestic and foreign oil import and export of machinery and equipment Products Services, including: drilling machinery (drill, drill pipe, square pipe, drill collar, screw drill), oil production machinery (pumping, ground-driven screw pump, electric submersible screw pump, pump, sucker rods, valves, various types of downhole tools), pipe (tubing, casing, pipe, glass pipe, composite pipe ), oil field chemicals (such as drilling fluids, completion fluids, workover fluids, anti-foam agent, emulsifier, oil microorganisms, scale, etc.) and oil technology development, transfer and services.

公司主要产品和服务范围包括：自营和代理国内外各类石油机械设备产品的进出口服务，主要包括：钻井机械（钻机、钻杆、方钻杆、钻铤、螺杆钻具）、采油机械（抽油机、地面驱动螺杆泵、电潜螺杆泵、抽油泵、抽油杆、阀门、各类井下工具）、管材（油管、套管、输送管、玻璃钢管、复合管）、油田化学品（如钻井液、完井液、修井液、防泡剂、乳化剂、采油微生物、阻垢剂等）以及石油技术的开发、转让和服务等。

This paper lists some important factors of influencing safe operation of bow net system,introduces pantograph and anti-scrape bow protection device which is installed on service locomotive,and discusses a new technology of improving pantagraph current quality——self-adaptive bow head system.

列举了影响弓网系统安全运行的几项重要因素；介绍在运营机车上试验安装的受电弓防刮弓保护装置，以及因该装置所产生的提高受流质量的新技术——自适应弓头系统；提出了两个系统整合的创新点。

This article elaborates the full-scale test at present electric railway bow net system, designs a new control system to fall the Pantograph fall and introduces a home unusual, controlled Pantograph fall in the busy host skeleton line. This research provides reference for the furthur study of bow net protection system by artificially creating the real appearance of bow net relations.

从实际试验出发，阐述了在目前电气化铁路弓网系统中，对弓网保护装置所起作用的一种验证方法，同时构思和设计了一种新型的受电弓滑板掉块控制系统，并介绍了一次国内少有的、在繁忙主干线上控制受电弓滑板掉块造成人为弓网关系再现的真实过程，为进一步开展弓网保护系统研究提供参考。

He laid the notch of the arrow on the oxhide bowstring, and drew both notch and string to his breast till the arrow-head was near the bow; then when the bow was arched into a half-circle he let fly, and the bow twanged, and the string sang as the arrow flew gladly on over the heads of the throng.

他运气开弓，紧捏着箭的糟口和牛筋做就的弓弦，弦线紧贴着胸口，铁的箭镞碰到了弓杆。他把兵器拉成了一个拱环，借大的弯弓鸣叫呻喊，弦线高歌作响，羽箭顶着锋快的头镞飞射出去，挟着暴怒，呼啸着扑向前面的人群。

While there are 3 different versions of the Bow Madness, the Bow Madness Standard is the bow that had our test team slobbering on their kisser buttons.

虽然有3个不同版本的弓疯狂，弓疯狂标准是弓，如果香港的测试组对他们接吻按钮slobbering。

The bow will correspond to the traditional form of a long bow which means that when strung the string may not touch any other part of the bow but the string nocks.

长弓应符合传统的长弓形式，上了弓弦之后不能接触弓的其它部位，而仅能接触弦扣部份。

More direct, directer ; most direct, directest

径直的，笔直的

Do you know how to use a chain saw?

你知道如何使用链锯吗？