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Fixtureless join of scraper conveyor cable pan using in mechanize working face;2. The join of hydraulic tractive shearer with electromotor crosswise arrangement;3. With the help of an example of drawing elastic loop s join into in-phase Gear of Boots blowers,dynamic system software ADAMS is utilized to analyze its driving process.

以罗茨鼓风机同步齿轮端引入弹性环联接为例，利用系统动力学软件ADAMS，对其传动过程进行动力学分析，得到了在引入弹性环联接后摩擦力变化曲线，弹性环安装精度对弹性环联接可靠性影响等有益弹性环应用的结论。

And the direction query efficiency based on multi-approximate index is compared with that based on taditional external approximation index. 2 The algorithms of nearest neighbor and reverse nearest neighbor about point, line and ploygen based on multi-approximate index are proposed after the virous methods of distance measure are discussed in detail. And the query efficiency of NN and RNN based on multi-approximate index is compared with that based on taditional external approximation index. 3 The basic concept of semi-join and the strategy of distance-direction semi-join are introduced. And the model of distance relationship, direction relationship and the bounding for spatial object are discussed. Then the method is presented about how to implement the query of distance-direction semi-join, and the efficiency of the algorithm based on multi-approximate index is compared with that based on taditional external approximation index.

即：1在方向关系矩阵模型、开域方向模型基础上，讨论了基于多重近似索引下的定性与定量方向检索方法，并通过实验对基于多重近似索引与外部近似索引下的方向检索效率进行了对比分析；2详细讨论了各种距离度量方法，提出了基于多重近似索引下的点、线、面的最邻近查询和反最邻近查询算法，并通过实验对基于多重近似索引与外部近似索引下的最邻近查询和反最邻近查询效率进行比较分析；3介绍了半连接的基本概念，探讨了距离关系、方向关系以及空间对象数量的约束模型，给出了基于多重近似索引下的距离方向半连接实现方法，并通过实验对基于多重近似索引与外部近似索引下的距离方向半连接的效率进行了比较分析。

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Select * from a left inner join b on a.a=b.b right inner join c on a.a=c.c inner join d on a.a=d.d where …..

说明：两张关联表，删除主表中已经在副表中没有的信息

The organizers of this exhibition are an internationally renowned exhibition agency – Ahoy Rotterdam and VNU Exhibitions Asia.

而本次博览会的承办方更是在国内外享有盛誉的主办展览组织机构-荷兰 Ahoy 展览集团公司和 VNU 亚洲展览集团上海万耀企龙展览有限公司。

The technology and equipment displayed in the exhibition mainly focus on the field of mechanical equipment manufacture in the world, including aircraft, space technology, automobile, motorcycle, mechanics, and war industry. Scale of this exhibition increases over 50 percent each year.

展览会本着振兴装备制造业，促进西部工业经济发展为宗旨，主要集中展示国内外机械装备制造领域的新技术新设备，面向航空航天、汽车、摩托车、船舶、国防军工、通用机械、仪器仪表、五金制品、轻工、电子及科研院所等行业服务。

In a few months, it held on electronic video called 'the exhibition of Gao Bian Jiang', and to emphasize interaction of deformity children and artists of 'Forge The Fable' and to lay out 'exhibition of ceramics ' of Chinese Avant-courier's ceramics.

在成立的短短几个月内，就举办了以电子影像为平台的'高边疆展'，以强调残疾儿童和艺术家互动的'构筑寓言展'和第一次展示中国先锋瓷器的群展'瓷展'。

This article reviews 2003 International Architecture and Design Biannual Exhibition of Sao Paulo, elaborating the connotation and meaning of the theme of this exhibition metropolis .

本文回顾了2003圣保罗国际建筑与设计双年展，阐述了本次展览"大都市"主题的内涵和意义。

As a biyearly automotive aftermarket exhibition, AMR spring 2009 is going to be launched in New China International Exhibition Center on Feb.

第51届全国汽车保修检测诊断设备展览会将于2009年2月25日——28日在北京中国国际展览中心（位于北京顺义天竺空港城商务区）举行。

Listen,point and check your answers.

听，指出并且检查你的答案。

Warming needle is one of effective treatment methods for knee arthralgia aggravated by cold,and it is simple,safety,so it should be developed in clinical acupuncture and moxibustion extensively.

但以本院科针灸门诊在2005年1月—2006年6月期间共收治膝痛患者100余例，经过临床的诊断后，其中施以温针治疗的48例，疗效显著，报道如下。1临床资料本组病例48