电弧

Main control circuit adopts electric controlled to exchange electronic switch technology and passing zero detection techniqueing advanced electronic device, which realize to pass zero level and smooth to its cutting ,shuting floodgate and bludgoning into , no over voltage when operating it , there is no electric arc to fire again to shove to have to throw condenser bank, condenser need is it can come into operation again to discharge, its cutting restriction of number of times to throw.

主控制电路采用电力电子器件可控交流电子开关技术和先进的过零检测技术，实现电容器组的过零平滑投切、无合闸涌流冲击、无操作过电压、无电弧重燃，电容器无需放电即可重新投入使用，并且不受投切次数的限制。

Brown aluminium oxide abra-Sive is electrically fusedin an arc-furnace from a mixture of bauxite, cokeas main raw ma-terials at high temperature. Its chemical composition contains Al2o3, TiO2, a small amount of SiO2,and Fe2o3, etc., micro-hardness: 18000-22000MPa, tou-ghess: higher than silicon carbide.

棕刚玉是以铝钒土、焦碳为主要原料，在电弧炉内经高温冶炼而成，主要化学成分为Al2O3TiO2还含有少量的SiO2和Fe2o3等，显微硬度Hv18000一22000，韧性比SiC高，用它制成的磨具，适于磨削抗张强度较高的金属，如各种通用钢材、各锻铸铁、硬青铜等。

White fused aluminium, oxide is electrically fused in the furnace with high-grade alumina powder as row materials.It has higher hardness and sightly lower toughness than brown fused aluminium oxide,character-rized by its high purity,strong grinding ability.

白刚玉是以铝矾土为原料，在电弧炉内高温冶炼而成，它具有颜絮白，硬度高，韧必稍低，纯度高，自锐性优，磨削力强，效率高，耐酸碱腐蚀，热稳定性高等特点，它不但是高级磨料磨具材料，且还是高级研磨，抛光材料等。

The secondary variables include the angle of the electrode to the work, the angle of the work itself, the thickness of the flux layer, and, most important , the distance between the current pickup tip and the arc also called electrode stickout.

次要变量包括电极相对于工作台的角度、工作台角度、焊剂层的厚度以及导电嘴和电弧的间距。其中电极干伸长是最重要的变量。

In view of these problems,an intrinsically safe pilot circuit for underground motor intelligent protective systems based on single chip microcomputer is given according to the design specifications of intrinsically safe circuits and the requirements of microcomputer control systems.

井下最大的特点就是存在瓦斯和煤尘，而微机保护系统在发生故障时所产生的电火花或电弧是井下火源之一，因此对于井下电气设备及其控制系统必须采取严格的防爆措施以防止瓦斯和煤尘爆炸。

Properties and compositions of the residues from pyrolyzing Datong coal by thermal plasma arc were studied.

研究了电弧等离子条件下大同煤热解残渣的组成及特点。

The gun body of vacuum plasma welding chamber for titanium and titanium alloy imported from Germany has been reformed based on the principle of compression effection of plasma arc and stability of electric arc.

为了满足大尺寸钛及钛合金电极的焊接要求，宝钛集团有限公司依据等离子弧的压缩效应原理及电弧的稳定性原理，对从德国引进的钛及钛合金真空等离子焊箱枪体的阴极和喷嘴进行了技术改造。

The gun body of vacuum plasma welding chamber for titanium and titanium alloy imported from Germany has been reformed based on the principle of compression effection of plasma arc and stability of electric arc.

改造后，不仅提高了电弧的稳定性，而且也扩大了电极的焊接尺寸。

It's also applied in base plate of electric circuit, analysis reagent and hig-pressure-Na-lamp materials. It can be made to analyst carrier used in petroleum chemical industries.

Al〓O〓超微粉还可用于：制造集成电路基板，用作分析试剂及高压钠灯电弧等高级陶瓷原料；将纳米化α-Al〓O〓制成条状用作催化剂和催化载体，是石油炼制和石油化工中的主要催化剂和载体。

Two alloying platings composed of same basic component for both deposited layer and the substrate , prepared by non-magnetron ion plating with arc source process, are analyzed with scanning electron micro.

对QA19-4/Cu及1Cr18Ni9Ti/45钢等两类同基合金的非磁控电弧离子镀镀层进行的扫描电镜分析结果表明，由于弧流携带的液滴较多，沉积层组织呈细密的片层状，层厚2-3μm。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。