Once upon a time, there was a crab who lived in a crack on the side of a creek.
从前，一条小溪的裂缝里住着一只蟹。
This research is mainly focused on the influence of crack on the wave propagation in cracked media.
本文以裂隙对波传播的影响为主要研究目标。
This paper analyses the reasons of crack on the cold saw blade from Laigang Heavy H-Beam production line.
介绍了莱钢大型H型钢生产线冷锯锯片产生裂纹原因的研究与分析。
Being a more serious defect, transverse crack on slab surface is very harmful to slab production and quality.
铸坯表面横向裂纹是连铸坯较严重的缺陷，其对铸坯的生产和质量危害很大。
The stability of the periodic motion decreases as the depth of the transverse crack on the rotating shaft increases.
裂纹深度的加大降低了系统周期运动的稳定性。
We also make tentative researches for fatigue fracture and for the effect of secondary crack on fatigue crack growth.
本文还在疲劳断口的研究方面进行了新的尝试，探讨了二次裂纹对疲劳裂纹扩展的影响。
This article recommends a local noncontact method to remedy the surface crack on the backup roll of the hot rolling mill.
本文介绍了用局部不接触法修复轧机支承辊表面裂纹的方法。
The cause of the grinding crack on medium frequency induction hardened CAM shaft made of spheroidal cast iron was analyzed.
对球墨铸铁中频淬火凸轮轴磨削裂纹产生的原因进行了分析。
The longitudinal surface crack on thin slab is a serious quality defect at thin slab continuous casting and rolling process.
薄板坯表面纵裂是连铸连轧生产线上的严重质量缺陷。
The cause for Angle crack on small billet in Chengde Iron and Steel Company is analyzed, the measures to prevent it worked out.
对承钢小方坯角裂产生的原因进行了剖析，并制订出相应的措施以减少裂纹。
The reasons for creating vertical joint crack on the reinforced concrete beam used in practical projects are analysed in this paper.
本文针对实际工程中钢筋混凝土梁出现贯通垂直裂缝的原因进行了分析。
By the theory of complex functions, a penny-shaped crack on axially symmetric propagating problems for composite materials was studied.
复变函数论的方法，对复合材料的圆盘状裂纹的轴对称性扩展问题进行研究。
My work can be summarized as follows: (1) According to the characteristics of crack on concrete structure, I realize the width measurement algorithm.
本文主要完成以下工作：1根据混凝土结构裂缝图像的特点，实现了混凝土结构裂缝宽度的测量算法。
The crack on the wall of building, which is a common disease of the building that the users complain very strongly recent years, is a common quality problem.
建筑物墙体的裂缝是近年来用户反映比较强烈的建筑通病，也是常见的质量问题。
The runners of 6 operated generating unit of Ertan Hydro Station have been checked and no crack on the primary weld of the field welding position is observed.
二滩水电站已全部投运的6台机转轮经停机检查，现场焊接的主焊缝无裂纹。
In the view of the concrete's minute construction, cement and mortar encircled bone, there is tiny crack on interface of bone and mortar under temperature load.
从混凝土组成的细观角度出发，研究水泥砂浆包围的骨料，在温度荷载作用下首先在骨料与砂浆的界面上产生界面微裂缝。
For small gush of water or water leaked from crack on the surface to be shotcreted rock face grouting or tube piloted discharge should be applied before shotcreting.
受喷面的小股水或裂隙渗漏水宜采用岩面注浆或导管引排后再喷混凝土。
The reason of arc crack on retarder gear surface was analyzed by means of chemical composition analysis, hardness testing, macrostructure and microstructure examination.
通过化学成分分析、硬度试验、宏观和微观检验等方法，对减速机齿轮齿面弧形裂纹的产生原因进行了分析。
In this paper, the applicability of existing concrete structural component is evaluated by tests of the deflection and anti-crack on normal service limit state conditions.
针对正常使用极限状态下的挠度、抗裂等的检验来评定既有混凝土结构构件的适用性。
This article, first, mathematical models of one kind of gear fault in one— stage gearbox (the fatigue crack on root of tooth) are established on the basis of gear dynamics.
本文以齿轮动力学为基础，推导并建立了单级齿轮传动的一种齿轮失效的数学模型，即：齿根裂纹数学模型。
It is efficient to eliminate the occurrence of transverse crack on weld by means of optimizing welding, sizing process and strictly control to inclusions class of raw material.
通过严格控制原料的夹杂物级别和优化焊接、定径工艺可以有效地消除焊缝横向裂纹的产生。
The effect of the length, the shape, and the location of a crack on the vibration frequencies and the directivity patterns of the sound field radiated from the plate are investigated.
探究了裂纹长度、形状、位置对薄板振动频率和辐射声场指向性特征的影响规律。
The effect of thermal induced crack on sediment rock is discussed. The methods of acoustic measurement and nuclear magnetic resonance technology are applied for detection of the crack.
研究热开裂对储集岩石的物性影响，系统地考察了声学检测、磁共振技术等方法在检测岩石热开裂中的效果。
Normal service life of U74 heavy rail and service life of the damaged rail are estimated by fracture dynamical analysis and possible mechanism on the longitudinal crack on the rail discussed.
通过断裂力学分析，估算出u 74重轨的正常使用寿命及伤轨残余使用寿命；探讨了钢轨纵裂的可能机制。
Aemission spectrometer, micro-hardometer, optical microscope and scanning electron microscope were used to analyze the reason of crack on connecting rod unit assembly for piston of car engine.
采用直读光谱仪、显微硬度机、光学显微镜和扫描电子显微镜等分析手段，对失效的汽车发动机活塞连杆总成断裂原因进行了分析。
Accordingly, we can just use the characteristic to estimate the cause for the appearance of crack on the structure and judge the harm of the crack in order to take corresponding reinforce means.
因此，可以利用这一特性初步判断结构上出现裂缝的原因，评判裂缝的危害，从而采取相应的解决措施。
Accordingly, we can just use the characteristic to estimate the cause for the appearance of crack on the structure and judge the harm of the crack in order to take corresponding reinforce means.
因此，可以利用这一特性初步判断结构上出现裂缝的原因，评判裂缝的危害，从而采取相应的解决措施。
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