钻孔

It will be widely use to broaching the high quality PCB board and other accurate mechanical broaching, and so on.

种高质量PCB的钻孔和各种机械部件的精确钻孔等其它精确钻孔的应用。

This paper focuses on the application of the methods developed in ISAM to the Borehole Safety Assessment which is based on the Borehole Disposal Concept of Nuclear Energy Company of South African.The hypothetical geosphere and biosphere characteristics for the safety assessment are derived from the radioactive waste disposal site in northwestern China.

本文采用ISAM中开发的评价方法，参考南非原子能公司的钻孔设计概念，并根据我国西北放射性废物处置场的岩石圈和生物圈特性假定场址，对废放射源钻孔处置安全评价方法进行了研究，为我国废源钻孔处置的安全性提供依据。

Research and development of this project is a new quick-setting polymer drilling expansion agent, mainly used for determination of gas pressure sealing sealing boreholes, the quality can also be used for different conditions of pressure measurement of the coal seam gas drilling sealed.

本项目研发的是一种新型高分子速凝钻孔膨胀剂，主要用于封孔测定瓦斯压力钻孔的封孔，也可用于不同质条件下的煤层瓦斯压力测量钻孔密封。

This paper mainly deals with the components of new acoustic borehole televiewer and the performance characteristics; at the same time, the paper compare the new acoustic borehole televiewer with the ordinary optical one and the old acoustic one.

中文摘要：主要介绍了新一代超声波钻孔电视的主要组成部分及其性能特点，并初步比较了其与常见的光学钻孔电视和前几代超声波钻孔电视的区别。

The breakouts began to occur under the depth of 1200m in the main borehole of Chinese Continental Scientific Drilling, 82 breakout images are collected from acoustic borehole televiewer data between 1200m and 2010m.

中国大陆科学钻探主钻孔在1200m深度以下出现了钻孔崩落现象，我们在1200m至2015m的范围内采集了82个钻孔成像测井图象资料。

Bearable speedy rotation for boring head is 4500RPM Fit for the furniture and toys com bination series Can be fixed in general boring machine for using.

钻孔能力：木材、塑钢最大φ40，钻孔头可承受高速运转马达4500RPM，适合家具类、玩具组合系列，可装在一般钻孔机使用。

Deere Brush type: drilling sanding fleecer hair one-stop production lines, hair drilling machine, drilling machine, hair machines, shearing machines, such as sanding.

迪尔制刷的类型：钻孔植毛剪毛磨毛一条龙生产线，钻孔植毛机，钻孔机，植毛机，剪毛磨毛机等。

However, during borehole grouting pile construction of the present, round section piles are used universally. Generally speaking, the boreholes are drilled by a large diameter round piling bit. Because of the restriction of factors of the mud pumps, and drilling equipments, and drilling technique, it would result in such problems as fol lowing: a bigger cutting area and overlarge cuttings volume, and more hole bottom sediments, difficult cuttings discharging, and serverely repeat cuttings breaking, and using more concret grouting amount, and lower drilling speed, faster bit wearing, and longer working period, bigger material and labor ex haust, and higher engineering cost, unreasonable ratio of loading capacity to volume of pile foundation, and lower comprehensive economic benefits, and so forth.

然而，钻孔灌注桩施工中，目前最为普遍采用的是圆形断面桩基，一般采用大口径圆形基桩工程钻头，由于国内生产的泥浆泵、钻具及钻进方法等因素的限制，从而使钻孔破岩面积和体积过大，造成孔底沉渣过多，排渣困难且排浆量大，重复破碎问题突出，混凝土灌注量大，直接反映为钻进效率低、钻头磨损快、施工工期长、材料能耗和劳动消耗大、工程成本较高、桩基荷载能力与体积比不合理、综合经济效益不理想等，这些问题严重影响和制约着钻孔灌注桩施工技术的发展和进步。

Methods: Clinical data of 32 cases of patients with complicated posterior urethral stricture treated by the trepanning appliance and the 21 cases by common operation were retrospectively reviewed.

在对32例复杂性后尿道狭窄患者行开放性手术中，使用后尿道钻孔器钻孔，并与21例常规后尿道钻孔的疗效进行对比。

This paper introduces the construction technique of bored pile in Raoyang Rive superlarge bridge on Shengshan expressway, points out selection method of driller, construction method and specific gravity of slurry in liquified area, and provides good reference to similar projects.

介绍了沈山高速公路绕阳河特大桥钻孔灌注桩施工工艺，提出了在液化区钻孔施工时钻孔机具、工方法、浆比重等的选择方法，为其它类似地质条件下的钻孔施工提供了施工经验。

If you are unfortunate enough to the lovelorn, please tell me, I will help you out, really, please contact me!

如果你不幸失恋了，请告诉我，我会帮助你摆脱困境，真的，请联系我啦！

China's plan to cut energy intensity by 20 percent and pollutant discharges by 10 percent between 2006 and 2010 is a case in point.

中国计划在2006年到2010间降低20%的能源强度和减少10%的主要污染物排放，就是一个这样的例子。