置换

The excrescence during the helium replacement in satellite gas store case was tested and analyzed by using gas chromatography of GOW-MAC and Agilent company.

用美国GOW-MAC公司的气相色谱仪和Agilent公司的气相色谱仪对某卫星气体贮箱在氦气置换化验过程中发现的未知杂质进行试验分析，经分析未知杂质的来源可能是所用气体贮箱处理时的残留物。

Results Therehave 2 cases phlebitis,9 cases fluid exosmose and 3 cases other adverse effects in A group; Therehave 8 cases phlebitis,18 cases fluid exosmose and 4 cases other adverse effects in B group.

将236例需行血浆置换的患者随机分为A和B两组，A组采用BD静脉密闭式留置针穿刺(120例)，B组采用普通静脉穿刺针穿刺（116例）。

From traditionary nucleus pulposus exsection to spinal fusion,endoscope and minimally invasive techniques,and prosthetic disc nucleus and artificial disc replacement in recent years, however,they relieved clinical complaint temporary by means of the destruction of structure and function of lumbar intervertebral disc.

从传统的髓核摘除术到脊柱融合术、内窥镜和微创技术及近年开展的人工髓核和椎间盘置换术，但它们都是以破坏椎间盘结构和牺牲生物力学功能为代价的，不能阻止和逆转椎间盘退变，因此椎间盘退变的基因治疗和组织工程成为研究的热门课题。

Subgroup, Factor Group, Isomorphism, Ring, Ideal, Field, Polynomial Ring, Factor

课程内容：群，子群，置换群，循环群，交换群，正规子群，商群，群之同构，环，理想，体，多项式环，商环等。

Chengdu fan letter Acer industry company limited by guarantee, established in 2003, is a real estate mortgage and personal Yi Shoufang, the secondary mortgage loan business led to replacement housing for the guidance of diversified real estate operating companies.

成都藩信宏业担保有限公司成立于2003年，是一家以房地产抵押贷款及个人一手房、二手房按揭贷款业务为主导，以房屋置换、信用卡业务为辅导的多元化房地产金融服务公司。

Objective To explore the effect of hip surface replacement on the mechanical characteristics of proximal femur.

目的 探讨股骨头表面置换术对股骨近段生物力学性能的影响。

The sphere that the Firebomb shader is assigned to does scale up over the course of the animation for the majority of the explosion's swelling effect, but the detailed crevices and contours of the billowing fire and smoke are achieved through a displacement map.

这个爆炸火球的材质，是在火球的爆炸效果的动画过程中设计为按比例缩放，但详细的裂缝和涌出的火焰的轮廓和烟是通过一个置换贴图来完成的。

The reaction mechanism and the latest research status of displacement fluorination of aromatics are summarized, and the development trends are forecasted also.

摘要综述了芳香族置换氟化的反应机理与最新研究状况，并展望了其未来发展前景。

Four groups of oligonucleotides were successively cloned in pMD18-T vector to obtain four large fragments. Ligation of these four fragments resulted in a cloned DNA MgE717 coding for the 29～268 amino acid region of gE. Sequencing result showed that there is a mutation at 255 amino acid, Asn instead of Asp.

分四段分别合成，基因拼接得到了改造后的基因片段MgE717，经测序，除了在gE基因+763位核苷酸处存在一碱基置换，导致第255位的氨基酸残基由Asp突变为Asn，其余的序列与PrV鄂A株gE基因的氨基酸序列相符。

The frequency of replacement is a function of the sensitivity of the instrument i.e.

阱的置换频率是这个装置的一个敏感要素。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐