It is used to determine the orientation of a vertical fracture from interference test.
利用此模型可在干扰试井中确定垂直裂缝的方位。
Objective To evaluate the clinical effect of preserving the lower first molar with complete vertical fracture.
目的评价保存治疗纵折下颌第一磨牙的临床疗效。
Vertical fracture height from hydraulic fracturing is very important for calculating fracture length and width.
水力压裂所形成的垂直裂缝高度，对于计算缝长和缝宽有重要作用。
Methods100 molars with vertical fracture were cleaned and fixed by metallic ring. Then root canal treatment (RCT) were completed.
方法100例纵裂磨牙采用先对患牙初步清理复位带环固定根管治疗后全冠修复保存患牙。
The results of the experiments, compared with vertical fracture, effect of the parameter on the productivity is evaluated in the end.
并用本模型的实验结果与垂直裂缝情况下做了对比，评价参数对产能的影响。
CONCLUSION: Posterior teeth with vertical fracture, extraction may be avoided if prompt diagnoses and consummate treatment were performed.
结论：后牙纵折后及时诊断并经过完善治疗，可以保存患牙而避免拔牙。
Therefore, the impact of starting pressure gradient must be considered when analyzing the productivity of vertical fracture well in low permeability reservoir.
因此，在进行低渗透油藏垂直裂缝井产能分析时，必须考虑启动压力梯度的影响。
A new calculation mode of the earth stress of vertical fracture is built based on generalized Hook 's law in this paper, which is suitable to hydraulic fracturing cracks.
该文基于广义虎克定律，建立了适用于水力压裂裂缝为垂直裂缝的地应力计算模式。
In view of seepage process in vertical fracture well in low permeability reservoir, considering kickoff pressure gradient and media deformation coefficient, bilinear flow model is established.
针对低渗透地层垂直裂缝井的渗流过程，考虑了启动压力梯度和介质变形系数的影响，建立了三线流模型。
Fractal dimension of impact fracture surface of 08f steel was measured by vertical section method.
利用垂直截面法测量了08f钢经不同形变氮化复合后冲击断裂表面的分形维数。
The critical fracture curve when cracks are vertical to the layered rock mass has also been obtained by using numerical values KI and KII.
由计算所得的KI和KII数值解，得到了裂纹垂直于层面时此泥板岩的临界断裂曲线。
On the basis of imaging characteristics the fracture of lamina of vertebral arch was divided into 5 types: vertical, transversal, "7" -graphemic or reverse "7" -graphemic, "s" and displaced.
根据影像特点将椎板断裂形态分为纵向型、横向型、“S”型、“7”字型与反“7”字型及断裂移位型5型。
When the fracture exists in the stratum, pressures in parallel direction falls much faster than that in vertical.
当地层中存在裂隙时，平行裂隙方向压力下降比垂直裂隙方向要快得多。
There are abundant fracture types including high angle shearing cracks, middling or low angle shearing cracks, transmeridional high angle tension cracks and meridional vertical shearing cracks.
裂缝类型包括，高角度（直立）剪切缝、低角度剪切缝、高角度张裂缝和南北向直立剪切缝。
In the meantime, fracture developing frequency of Fuyu oil pay zone is analyzed and calculated by using ratio of vertical wave velocity - "crocodile factor" method.
同时，运用纵波波速的比值——“龟裂系数”方法对扶余油层储层的裂缝发育频率进行了分析、计算。
The vertical flow of underground thermal fluid resulted from the opening fracture is the important cause of geothermal anomaly.
开启断裂造成的地下热流体的垂向流动是造成地下热异常的重要原因。
The investigation shows that the vertical shaft of the front fork is subject to fatigue flaw due to the cyclic stress, which leads to the fracture of the vertical shaft.
研究结果表明，前叉立管在周期应力作用的环境中使用，非常容易形成疲劳裂纹，由此导致了摩托车前叉立管的断裂现象。
In was found from several model tests showing that, there are two fracture sliding planes yet none of them is vertical.
但是在模型试验中，却发现两个破裂滑动面都是倾斜的。
Hydraulic parting, which can form a symmetrical and vertical plane of fracture in the formation that surrounds a well is an effective measure of increasing production.
水力压裂是一种有效的增产技术，它能使油井周围地层形成一个对称的垂直裂缝面。
When lateral sealing was formed by fracture fillers the fault can be sealed in vertical direction.
当断裂填充物构成侧向封闭，断层在垂向上也应是封闭的；
The vertical impact between tracks and support rollers is one of the most important factors in evaluation of the noise and anti-fracture capacity of the track.
履带装甲车辆的履带与托带轮的垂向冲击是产生冲击噪音和导致履带疲劳与断裂的重要因素。
Obiective to study the application of root apex locator to diagnose vertical root fracture.
目的研究应用根尖定位仪诊断牙根纵裂。
The conclusion is that the size of terrestrial stress mainly is vertical principal stress maximum and the fracture of hydraulic fracturing is vertical.
最大水平主应力方向以近东西向为主，水力压裂裂缝的延伸方向也以近东西向为主；
Using the theory of hydraulic fracture, radial and vertical distributions of excess pore water pressure are subsequently studied along the pile surface during and after pile driving.
运用水力压裂理论推导出沉桩产生的超孔隙水压力在沉桩后瞬时沿桩身径向和竖向的分布。
Methods: 47 cases were analyzed by respective study to analysis the cauese , clinical characters . diagnosis and prevention methods of vertical root fracture.
方法：通过观察4 7例冠根纵折的病例，对牙位、牙髓状态、牙髓治疗情况进行回顾性分析。
To explore clinical features of vertical root fracture (VRF) and analyze the possible causes of VRF.
目的观察研究牙根纵裂的临床特征，分析其发病原因。
To explore clinical features of vertical root fracture (VRF) and analyze the possible causes of VRF.
目的观察研究牙根纵裂的临床特征，分析其发病原因。
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