On the other hand, straight-shank drills are held in a drill chuck that is, in turn, fitted into the spindle socket in the same way as tapered shank drills.

In chapter one, the author introduces the work theory and kinds of drill chuck, and analyzes the research background as well as the existing methods in this field, then presents significance of this study.

第一章对钻夹头的工作原理和分类以及参数化有限元的应用进行了综述，提出了本文研究的目的与意义。

Drill chuck with thread adapter

螺纹联接扳手钻夹头

The anti-skid drill chuck is especially suitable for the drill chuck used for the machine tool, the electric drill, and the air drill.

该防滑钻夹头特别适合作为机床、电钻、风钻上用的钻夹头。

Finite Element Modeling and Strength Analysis for Key and Bevel Gear of Drill Chuck

论组织企业管理培训的关键因素钻夹头扳手锥齿轮有限元建模与强度分析

A high efficiency drill chuck strength analysis system was developed by using Visual Basic. Net and APDL that is a secondary development parameter design language provided by ANSYS.

综合运用VB.Net和ANSYS提供的二次开发语言APDL，研制了一个钻夹头有限元强度分析系统。

The related key technologies of drill chuck's strength analysis were discussed and solved, such as the contact analysis parameters selection, the boundary conditions and the load processing, ANSYS command-string building and so on.

探讨和解决了钻夹头夹紧强度分析中夹爪与螺母接触分析参数的选择、约束边界和载荷处理、分析流程文件创建等关键技术问题。

Key type drill chuck, which is widely used in various minal and fixing enterprises, is a kind of drilltightening device.

扳手钻夹头是广泛用于各工矿企业，装修行业的钻头夹紧装置。

Based on the idea of the structure parametric design method, the parametric finite element model of drill chuck with complicated spiral surface character was established.

采用结构参数化设计方法建立了含有复杂螺旋曲面特征的钻夹头参数化有限元模型；

An Approach to the Cost Reduction of the Materials of the Key Type Drill Chuck by Using the Theory of Value Engineering

运用价值工程原理降低扳手钻夹头材料成本的探讨

Analysis and Investigation on the Centering Precision of Drill Chuck

钻夹头定心精度分析与研究

Key type drill chuck

GB/T6087-1993扳手钻夹头

Simulation Method Based on Manufacturing Characteristics and Analysis of Output Character of Drill Chuck

基于制造特性的仿真方法及钻夹头输出特性分析

The hand-operated multifunction electric tool is characterized in that the small and special electric machine can be connected with the drill chuck by hand to form the hand-operated electric drill.

其特征在于微特电机可以人为与钻夹头连接，便组成了手持式电钻；

The goal of this research was threefold: using Tr ü ck et al. ( 2006)' s results and methodology, we first investigated the changing market dynamics through the study of the futures and volatility term structures of EUA and found a market in clear contango.

本论文的目标有三层：第一，利用Trück et al.的结果和方法，通过对欧盟排放配额期货和波动的期限结构的分析来研究变化的市场动力，发现了市场明显地处于期货升水。

Second, we provided an empirical analysis of the EUA convenience yield in the EU ETS and studied its dependence on factors such as the spot price level and volatility.

第二，我们通过对欧盟排放配额便利收益的实证分析，发现现金价格和波动率是其重要的影响因素。

Both papers study the convenience yield of EUA futures using data available during the first phase of the EU ETS.

两篇文章利用EU ETS第一阶段的数据来分析欧盟排放配额期货的便利收益。

Crude oil, natural gas and coal also affect EUA price.

EUA价格也受原油、天然气和煤炭等能源价格影响。

He is as busy as a bee trying to put the house in order.

他为了要把家里弄得整整齐齐，忙了好一阵子。

But we have also heard the saying "as busy as a bee." Some bees will work only several hours, while some will work over 12.

有句英国谚语叫“像蜜蜂一样忙碌”，有的蜜蜂一天只要工作几小时，而有的竟然要工作超过12小时。

Busy as a bee, you always have a project in the works!

像蜜蜂一样忙碌的你总是在进行着一个项目！