碳化的

In order to solve the problem of low efficiency and short service life of hot pressed diamond bit when drilling in hard and compact formation, relations between diamond exposure of hot pressed bit and rock abrasiveness were analyzed in this paper. Research on matrix performances of hot-pressed diamond bit was firstly carried out.

针对在硬而致密岩石中钻进时效低的难题，本文分析了碳化钨基热压钻头的金刚石出刃与岩石研磨性等岩性之间的内在联系，认为钻头的胎体成分及其性能是关键，硬而带脆性的胎体性能有利于全刚石出刃，从而能提高钻进速度。

Fourthly, based onour experiments and the literatures', the necessities of endohedralmetallofullerenes' formation are the existence of well graphitized of carbonand metal acetylide.

四在实验和文献报导的基础上，提出原料中完好石墨化的碳和电石型金属碳化物的存在是形成Fullerene笼内金属包合物的必要条件。

For example, acetylene generated by the carbide process contains arsenical and sulphur compounds, and other impurities, which must be removed by scrubbingwith concentrated sulphuric acid before it is sufficiently pure for reaction with hydrochloric acid (此处有误,应为hydrochloride氯化氢) to produce dichloroethane.

例如，由碳化钙发生的乙炔气含有砷和硫的化合物以及其他的杂质，必须在乙炔有足够的纯度与氯化氢反应制造二氯乙烷之前，用浓硫酸洗去这些杂质。

My job was to investigate the role of toxins in the progression of melanoma, particularly to understand the role of the Aryl Hydrocarbon Receptor Pathway and how it can be stopped in order to slow down or altogether halt the metastasis of melanocytes.

我的工作将调查毒素在 melanoma 的反映中的角色，特别地了解 Aryl 碳化氢受容器的角色路和它能如何被停止，是为了要减慢或者全部使 melanocytes 的转移停止。

Description :The new Tungsten based IF material has up to twice the strength of the best impact resistant materials currently used in protective armor applications such as boron carbide and silicon carbide, and are over 5 times stronger than steel.

描述：基于 IF 材料的新钨比现有使用的保护装甲材料如碳化硼和金刚砂拥有两倍的最好冲撞抵抗效果，是钢强度的五倍以上。

Description :The new Tungsten based IF material has up to twice thestrength of the best impact resistant materials currently used inprotective armor applications such as boron carbide and siliconcarbide, and are over 5 times stronger than steel.

描述：基於IF 材料的新钨比现有使用的保护装甲材料如碳化硼和金刚砂拥有两倍的最好冲撞抵抗效果，是钢强度的五倍以上。

The leaves soft, fat and elastic, the good; hard and inelastic, not good; The color red-brown and even, the good; uneven, black, carbonized, and putrefied such as mud and leaves not opening, not good quality.

叶质柔软、肥嫩、有弹性的好，叶底硬、无弹性的品质不好；色泽褐红、均匀一致的好，色泽花杂不匀，或发黑、碳化、或腐烂如泥，叶张不开展属品质不好。

The application of high speed steel roll ring in the High Speed Wire Rods Plant of Tiangang Group is introduced.

介绍了高速钢辊环在天钢高线厂应用的情况，对高速钢辊环与碳化钨辊环的优缺点进行了对比，提出了高速钢材质辊环、轧辊在轧钢厂使用的可能性。

In this study,additives were used to con-trol the size and shape of CaCO3.Needle,sphere,short chain and hexangular plate likenanometer CaCO3were synthesized by introducing CO2to lime suspension under opti-mum condition.

采用鼓泡碳化法，在最佳反应温度、反应物浓度、气体流量的条件下，考察了不同添加剂对产物形状及粒径大小的影响，得到了粒径小于100 nm且分散性能良好的球状、针状、短链状及六角板状纳米碳酸钙。

Based on the durability characteristics of prestressed concrete structures,the durability limit states of carbonation and chloride ion attack are defined,respectively.Durability predicting models on the basis of reliability mathematics and stochastic processes are constructed,and the pure theoretical formulae of failure probability of prestressed concrete structures are analyzed.

根据预应力混凝土结构的耐久性特点，分别定义了结构构件在碳化环境和氯离子侵蚀环境下的耐久性极限状态，建立了以可靠性数学和随机过程为理论基础的数学模型，并对耐久性失效概率进行了理论分析。

For a big chunk of credit-card losses; the number of filings (and thus charge-off rates) would be rising again, whether

年美国个人破产法的一个改动使得破产登记急速下降，而后引起了信用卡大规模的亏损。

Eph. 4:23 And that you be renewed in the spirit of your mind

弗四23 而在你们心思的灵里得以更新