Laser centring device for X-Radiography

The structure, principle and application of a simple centring device used for the sharpening of hob cutters are described.

介绍了用于刃磨齿轮滚刀的简易对中装置的结构、原理及使用方法。

A Simple Centring Device for the Sharpening of Gear Hob Cutters

简易刃磨齿轮滚刀的对中装置

A centring device is arranged at the bottom of the matrix transfer ring.

胎体传递环底部安装有对中装置。

The setting range can be extended by removing the centring sleeve.

拆卸定心套筒后会扩大调整范围。

Group Testing Problem on B-d Model

关于B-d模型的群试问题

Objective To study the related factors for B-D test positive results and make the appropriate strategies.

目的总结B-D试验阳性结果影响因素，制定相应的对策。

METHODS The B-D test and biological monitoring were used.

方法使用GETINGE全自动清洗消毒器+安必洁3M低泡多酶消洗液对污染物品进行清洗消毒，并通过B-D试验、生物监测。

Analysis of related factors for B-D test positive results

B-D试验阳性结果相关因素分析

Firstly, working process of pattern matching is introduced, and B-M algorithm is analysed, and main disadvantages are pointed out.

首先介绍了模式匹配技术的工作过程，接着分析了B-M匹配算法，进而指出了该技术存在的主要缺点；

The research on bainite-martensite ( B-M) spheroidal graphite cast iron

贝氏体马氏体（B M）球墨铸铁的研究

The Extension of B-M Integral Formula of Type I in C~ n

C~n空间中的第Ⅰ型B-M积分表示的拓广

Primary Analysis on 1.4% C Steel by Martensite Phase Transition Phenomenological B-M Theory

用马氏体相变B-M表象理论对西山关系的初步分析

541 galaxie formed an obvious sequence along a diagonal of the two color diagram ( B-V)_T~ o ( U-B)_T~ o. This can be explaned by the different mixture of stellar population, which made up the galaxies.

541个星系在（B-V）T~O-（U-B）T~O两色图上沿一条对角线形成一个明显的序列，这可以从组成星系的红兰星的混合效应得到解释。

In this paper, the research object was focused on the B-V oxidation of 1-indanone by using 30% hydrogen peroxide as oxidant and some liquid and solid acids as catalysts in solvent of 2, 2, 3, 3-tetrafluoro-1-propanol.

本论文着重研究以30%的H2O2为氧化剂、2,2,3,3-四氟1-丙醇作溶剂、三氟甲烷磺酸和其它固体酸作催化剂的反应条件下，1-茚酮为反应底物的B V氧化反应。

After deriving their effective temperatures and luminosities from their ( B-V), ( U-B) colors and parallaxes we find their positions in the HR diagram to be mostly confined to the main sequence.

在从样本星的色指数（B-V），（U-B）和视差得到它们的有效温度和光度之后，我们发现在赫罗图上它们大多数是位于主序带内的。

In comparison with inactive normal stars with the same effective temperature, in general, the active stars covered by spots are more blue in B-V colours and their equivalent widths of Li I 6708(?)

与非活动的正常恒星相比，表面被黑子覆盖的活动星有更蓝的B-V颜色，它们的LiIλ6708（？）

Using low concentration of hydrogen peroxide ( 30%) instead of peroxide organic acid as oxidant in B-V reaction is friendly to environment and with higher atom economy.

用低浓度的H2O2（30%）来代替传统的过酸作为B-V反应的氧化剂，对环境友好且原子利用率高。

The EL spectrum, the J-V and B-V characteristics have been measured, and the quantum efficiency has been calculated.

对器件的电流-电压特性、电压-亮度特性进行了测量，并计算了量子效率。

Objective: To study the effects of Bletilla hyacinthine gum ( BGH) on the mRNA expression of VEGF in rat fibroblast in vitro and explore its possible molecular mechanisms in promoting the wound healing.

目的：研究白芨胶对体外培养的大鼠皮肤成纤维细胞vEGF mRNA表达的影响，探讨白芨胶促进伤口愈合的分子机制。

Results: When fibroblast stimulated with different concentrations of BGH for 3 days, the expression of VEGF mRNA peaked with 0.5mg/ml BGH on the 5th day.

结果：白芨胶在不同浓度时连续干预至第3d，以0.5mg/ml浓度条件下，vEGF mRNA表达最强。