置换

Study on Improvement of Recovery of Gold and Silver from the Copper Dross Smelting in Reverberatory Furnace;2. After that, the copper in leach liquor can be extracted with the ternary extractant mainly containing P204, and the gold and silver in leach residue can be recovered by a process of cyanidation-replacement of Z.

为避免硫酸烧渣对环境的污染，以硫酸烧渣为原料，通过添加活性还原剂，用废硫酸直接还原浸出铁并制铁黄，而后用以P2 0 4为主体的三元萃取剂萃取回收浸液中的铜，用全泥氰化和锌粉置换工艺从浸渣中提取金银，较经济有效地回收利用了烧渣中的有价金属，铁、铜和金的回收率分别达到了 93。

Objective To investigate the main causes and treatment of trochanteric fractures in primary and revisional total hip arthroplasty.

目的 探讨全髋关节置换术及翻修术中股骨大转子骨折的原因与治疗方法。

Osteoporosis, coxa varus,coax dislocation and improper femoral neck osteotomy were the main causes of trochanteric fractures in primary or revisional total hip arthroplasty.

骨质疏松、髋内翻、髋脱位及股骨颈截骨不当等因素是全髋关节置换术及翻修术中股骨大转子骨折的主要原因。

METHODS: Forty patients with rheumatic heart disease undergoing cardiac valve replacement were randomly divided into two groups.

40例风湿性心脏病行瓣膜置换术的患者随机分为两组，试药组20例，对照组20例。

OBJECTIVE: To investigate the efficacy and safety of valve replacement with partly or whole mitral valve structure for treatment of rheumatic mitral valve disease.

目的：探讨保留部分或全部二尖瓣结构的瓣膜置换治疗风湿性二尖瓣疾病的有效性和安全性。

This paper discusses some important concepts, such as exploration depth and resolution of ground penetration radar, and then analyzes in detail the electric property difference and ground penetrating radar image characters of riprap, silt and some other medium as well as the detecting effect of GPR through the comparison between interpretation results and boreholing data, based on a case study of riprap replacing embankment project by blasting-extruding silt on an is-land.

首先讨论了探地雷达理论中的探测深度和分辨率等重要概念，然后以某海岛爆破挤淤抛石置换筑堤工程为例，详细分析了抛石、淤泥等介质层的电性差异及雷达波形特征，并将解释结果与钻探资料对比分析了雷达检测的效果。

OBJECTIVE: To compare the clinical outcome between fixed platform high-flexion prosthesis and rotating platform high-flexion prosthesis following total knee arthroplasty.

目的：比较应用固定平台高屈曲假体与旋转平台高屈曲假体行全膝关节置换后临床疗效的差异。

After investigation of a series of synthetic routes of Cefepime, we determined the best route and researched each step of the synthetic process for the goal of cost-cut, simplifying operation procedure and improving yield.

以7-ACA为起始原料，经硅烷化保护氨基和羧基、碘代、置换、脱保护、成盐、缩合、成盐等六步反应，合成了目标化合物，总收率为21％（以7-ACA计）。产品结构经1H-NMR、MS确证。

These textures are swapped out at run time with one of a set of textures.

这些贴图在游戏运行时将被程序地置换为其他的一些贴图。

Well, there"s the badge, the extra power and the refinement, but the Matiz is nonetheless a very efficient little runabout and copes with most situations adequately. It"s better-looking than competing five-door city cars, and the Daewoo package, which includes three years free servicing, AA membership and an exchange plan, helps the Matiz make sense too.

确实，配有奔驰车标的A级车动力强劲，做工精湛，但曼蒂姿仍然是一部不折不扣的称职的都市小车，同时，在大宇的配套服务中，还包括三年免费服务，AA会员资格以及汽车置换服务，这使得曼蒂姿的竞争力大大增加。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。