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It is proposed that the runner location should be first to be selected to ensure molten metal filling along the die wall in order to reduce melt flow resistance and then ingate should be located in the heavy section of the workpiece to which the melt would be filled at the beginning. As a result, the applied pressure could be transmitted fluently to avoid shrinkage cavity and to ensure castings quality.

指出浇道位置的选择首先要保证金属液沿着型壁顺序充填,以减少金属液的流动阻力;内浇道应使液态金属从制件厚壁处开始充填,以利压力的传递,消除缩孔,保证制件的质量。

Methods: To fill the root canals of the primary teeth using two different material, one group was filled with Vitapex iodoform paste and the other was filled with ZOE iodoform paste.

符合乳牙根管治疗原则者115例(150颗乳磨牙)随机分为两组,实验组采用Vitapex糊剂进行根管充填,对照组采用氧化锌碘仿糊剂进行根管充填,观察两组治疗6个月后的疗效。

Sequence stratigraphy provides a framework which can be used to predict the distribution of geologica l elements of reservoir forming for explorers, and in which the distribution of oil and gas has a certain disciplinarian.

层序地层学以层序为单位研究盆地充填样式、充填结构、沉积体系以及岩相在三维空间的展布,为石油地质综合研究提供了一个可预测形成油气藏的地质要素分布规律的层序格架,在这个格架中油气的分布有一定规律。

METHODS: Glass ionomer cement was filled into the cavity. The filling surfaces were respectively coated with vaseline, cocoa butter and luminous paint in each group. The control group was left intact.

将玻璃离子体水门汀充填于窝洞中,按照分组分别用凡士林、Coco butter及光亮漆涂于充填体表面,对照组表面不做任何处理。

AIM: To evaluate the obturation qualities of continuous wave of condensation technique with different tapered gutta-percha through measuring the molarity of glucose leaked from coronal to apex.

目的:通过体外检测从冠方向根尖方向渗漏的葡萄糖浓度,比较不同锥度牙胶尖配合连续波充填技术的充填质量。

Methods 200 cases with chronic pulpitis or periapical periodontitis were selected and randomly divided into 2 groups: experiment group and control group; one-time root canal filling was performed in experiment group while multiple root canal filling was performed in control group; the curative effect in both groups was observed.

随机各选择慢性牙髓炎、根尖周炎患者200例,分为实验组与对照组各100例,实验组采用一次性根管充填治疗,对照组采用多次法根管充填治疗,观察两组治疗效果。

In order to obtain an accurate and simple design and to express the relation between design parameters, and between the parameters and the design effect,based on the mathematical model of the neckband curve of a lapel shaping device, a spreading method by using MATLAB software was introduced. The selected parameters, the spreading plot and the 3D neckband entity were all displayed visually in a computer.

在常见的制袋充填封口的多功能包装机中,翻领成型器是利用其成型表面而使薄膜在输送过程中,强迫成型的原理而设计的一种制袋成型器,广泛应用于立式间歇工作的充填封口机上,圆形加料管翻领成型器由外表面为领状而内表面为管状的内外工作曲面组合而成(如图 1所示)。

The obturation time, incidence of pain during obturation and obturation quality were recorded and compared.

比较两组的根管充填时间、术中疼痛情况和根管充填效果。

Objective:To observe the effect of electronic apex locator and trial point on the quality of root canal obturation.

目的 :为改善根管充填质量,探讨根管长度测量仪加试尖对根管充填质量的影响。

Methods 112 teeth treated by complete root canal preparation were chosen to fill the root canal,and the main points of nursing during canal obturation were summarized.

方法对112颗进行根管充填的患牙进行护理配合,总结根管充填护理的要点。

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