查询词典 pack drill

The geologist needs to know what rocks the drill has reached, so every so often a sample is obtained with a coring bit. It cuts a clean cylinder of rock, from which can be seen the strata the drill has been cutting through.

地质学者需要了解钻探到了什么岩石，所以经常会从钻头穿过的岩层中得到一些岩石样本，切割岩石成为圆柱体。

To install the fixed filler on the corner cabinet, use a ф4.2MM drill to drill a hole on the bottom panel at a place near the fixed filler. Use pneumatic screwdriver to turn at the hole positions to form countersink holes. Use 4*50 self-tapping screws to secure the fixed filler on the bottom panel. Keep

转角柜固定封板的安装，先用ф4.2MM的直钻在柜底板靠近固定封板处打孔，/然后用风批头在打孔处转动几下形成螺钉沉孔，再用4*50的自功钉把封板固定在柜底板上/安装可调脚将柜底保持朝上，然后正面进入50MM画线并装好柜脚座。

The vibration of drilling string in horizontal well is closely related with the overall length of the drill string and structural shape. In this paper ,a mechanical model of longitudinal vibration of drill strings is established by studying the overall drilling string,seeing a hole as arbitrary bending curve in three-dimensional space.

本文以整体钻柱为研究对象，将井眼视为一条可以任意弯曲的三维空间曲线，建立了水平井钻柱纵向振动分析的力学模型。

This paper analyses that tip angle of drill bit influences on cutting capability and life of twist drill, when the material and shape of work piece is different.

分析了工件材料、形状不同时，钻尖顶角的大小对麻花钻切削性能及寿命的影响，介绍了麻花钻的钻尖顶角的选择。

From an angle of engineering application, this paper dealt with the wavelet packets decomposition principle and its energy spectrum monitoring theory, which were used to extract the features of drilling force signals. Meanwhile, with an aim at the strong randomization and uncertainty characteristics between the feature vectors and drill wears in drilling process, a kind of drill wear monitoring method based on Hidden Markov Model was presented.

从工程应用的角度论述了小波包分解原理及其能量谱监测理论，并将该理论应用于钻削力信号特征提取中，针对钻削过程特征矢量与钻头磨损之间具有较强的随机性和不确定性的特点，提出一种基于隐马尔可夫模型的钻头磨损监测方法。

Its main products include high-performance diamond bit of oil, drill work, such as underground power drill.

其主要产品有高性能的石油金刚石钻头、工程钻头、井下动力钻具等。

Based on the researches, new type products of geological engineering diamond drill bits series have been developed. The factory has 5 patented techniques. The key technology enjoys wholly independent intellectuar rights. The factory becomes one of the professional producers of diamond drill bits at home.

在此基础上研制开发了新型的金刚石地质工程钻头系列产品，拥有相关技术的国家授权专利5项，主要的核心技术拥有完全的自主知识产权，成为国内金刚石钻头的专业生产厂家之一。

Diamond drill bit, alloy drill bit and steel roller shrill b it and so on are available for drilling according to different geological structures.

根据地质结构的不同，可选用金刚石、合金及钢粒等钻头进行钻进。

Our products mainly include resin bond diamond grinding wheel, metal bond diamond grinding wheel, adamantine drill, geological drill as well as other diamond products made upon the demands of the customers.

主要产品有：树脂结合剂金刚石砂轮、金属结合剂金刚石砂轮、金刚石工程钻头、地质钻头及根据客户所需求的各种金刚石制品等。

BHA: including a solder, the composite films and diamond drill bits, and the hollow steel drill pipe.

钻具：包括各种钎具、复合片钻头和金刚石钻头，中空钢和钻杆。

The use of the web to spread fears that flicking the switch on the LHC could create a Black Hole that could swallow up the Earth particularly concerned him, he said.

他说，使用互联网散布恐慌说启动LHC会生成一个可能吞噬地球的黑洞的做法让他感到忧虑。

Not a single word have I written down.

我一个字也没有写下来。