查询词典 percussion drilling

The stroke reverse circulation drilling machine of CZF2000-1800 type is produced by our company newly to adapt to the demand of percussion drill market due to the development of road and bridge industry, it is specializedly used for pore forming of pebble and gravel stratum and hard stratum.

1800型冲击反循环钻机是我公司最新研制生产的为适应我国路桥事业发展对冲击钻机市场的需求，专门用于卵砾石地层、坚硬地层中成孔的钻机。

Using the action-oriented simulation strategy, a simulation software of percussion and rotary drilling has been developed.

根据本文建立的数学模型，采用面向活动的策略编制了一套能模拟冲击回转钻井系统钻井的仿真软件。

The dynamic model can not only help to improve the design of the impactor, but also help to determine its working properties and design the percussion drilling bottom hole assembly.

该动力学模型不仅可用于改进液动冲击器的设计，而且可用于优选液动冲击器的性能参数和冲击钻井钻具组合设计。

For a long time, they used percussion drilling - which basically means they hammered away at the ground to get as deep as they could get.

很长时间里他们用冲击钻井——基本上就是不停地砸地面，直到砸不动。

For a long time, they used percussion drilling - which basically means they hammered away at the ground to get as deep as they could get.

很长时间里他们用冲击钻井--基本就是说，不停锤打地面尽可能到达一个最深的深度。

In our life, especially in mechanics and engineering sciences, there are many nonsmooth phenomena. For example, the noise of a squeaking spoon in a bowl, or the chattering of machines, the grating of brakes, the percussion of drilling machines, the switches of auto-controller, the oscillation of crystal, etc.

在我们生活中，特别是在力学和工程技术领域，经常会遇到非光滑现象：比如勺子在碗里刮擦时发出刺耳的噪声，或者机器的振动、刹车的摩擦、打孔机的冲击、自动控制器的转换以及晶体的振荡等等。

According to the rock beaking theories, the percussion rotary drilling technique is one of the most effective ways to drill hard rock.

冲击回转钻进技术是当前解决硬岩钻进难题最有效的方法之一，将液动冲击回转钻进技术成功地推广应用于油气田勘探钻井中，预期可使硬岩平均钻进效率提高30％～50％，成本下降15％～20％。

Compared with traditional drilling methods with turning drilling rig and percussion reverse circulation drilling rig, the mentioned drilling technology can improve drilling efficiency and quality.

较之传统的回转钻机和冲击反循环钻机钻进，旋挖钻进工艺提高了成孔效率和成孔质量，同时拓宽了旋挖钻机的应用领域。

Because of long and thin structure characteristics, and sustain high frequency impact load under erosive medium, the drill rod's serve condition is most rigorous, and drill rod is one of the most easily damage tool in the percussion drilling rock system.

由于细长的结构特征和在腐蚀性介质中承受高频冲击载荷，使钎杆成为服役条件最苛刻、在冲击式凿岩系统中最容易损坏的机件，钎杆寿命低是制约凿岩爆破技术进步的关键问题。

In this paper a finite element model with the moving heat source and mesh remove technique in software package ABAQUS is used to simulate the process of percussion drilling with ultrashort laser. The temperature profile and residual stress distributions around the laser-formed hole can be calculated by a sequentially coupled thermal-stress analysis.

本文尝试以有限元素分析软体ABAQUS，利用移动热源之观念及网格移除技术来模拟超快雷射的多脉冲钻孔加工过程，以描绘出钻孔周遭的温度分布曲线，并透过顺序偶合法分析其所造成的应力场分布情形。

Since historical times,England ,where the early inhabitants were Celts, has been conquered three times .

从有历史以来，英国，在此地早期居住的是凯尔特人，已经被征服了三次。

Bluetooth OBEX File Transfer Enables the sending and receiving of files on your phone via Bluetooth.

蓝牙OBEX文件移动允许经过蓝牙传送和接受文件。。。。