作用于

Used for decoration on the window stickers of paper cutting.

用于在贴窗户上作装饰的剪纸。

Out of the electronic tube has come one particularly tough little war baby.

中间极，二次发射电极一种用于一定电子管作第二次发射电极

KCr(SO4)2.12H2O; a violet-colored salt used in hide tanning and as a mordant in dyeing .

kcr。ho；一种紫罗兰色的盐，用于制革和作媒染剂。

The Yongjia County great wild goose China valve Limited company is situated at the good communications superiorly, the humanities environment "township of the Chinese pump valve"- the cup northern town, this company specialized production seals the ball valve, the biased half ball valve hardly, low, high-pressured plate gate valve, oil field special-purpose valve, throttle cut-off valve, high-pressured check valve's specialized enterprise.

该系列法门结构合理，密封可靠，操作轻便。密封面均喷焊硬质合金，具有防腐、耐磨、耐冲蚀等优点，且可用于节流。尤其适用于工作压力16MPa—45MPa ，工作温度120℃的水、油、泥浆、天然气管线作控制介质流动的启闭及调节装置。永嘉县鸿华阀门有限公司地处交通便利，人文环境优越的&中国泵阀之乡&-瓯北镇，本公司专业生产硬密封球阀、偏心半球阀，低、中、高压平板闸阀、油田专用阀，节流截止阀，高压止回阀的专业企业。

Aimed at the problems, the improvement measures of extracting the modes of drilling speed and operating life of the bit from field data by multiple regression analysis, then, turning the selection index actual value into the corrected...

根据本方法对江汉油田部分地区的钻头使用资料进行计算分析，结果表明，选型结果是合理的，本方法是可行的，文中对钻头选型和钻井参数优选的配合，以及岩石可钻性用于钻头选型等问题也作了一些探讨。

Wire electrode based on the trajectory of the different forms of control, WEDM can be divided into three types: one is shaped by the imitation controlled cutting in line in advance and work to create the same shape by mold, when processing the workpiece at the same time rough and on the mold clamping in the machine tool table, in the process of cutting wire electrode tightly against the mold on the edge of the track for the mobile, thus cutting out and die on the same shape and precision to the workpiece; another One is the electro-optical tracking control, to carry out the cutting line, before the basis of certain parts to enlarge the proportion of drawings depicts an electro-optical tracking map-processing machines will be placed in design stage of electro-optical tracking, tracking platform Photoelectric first line of graphics has always been to follow the track of the Mexican campaign, and then through the use of electrical, mechanical linkage to control the machine tool table, together with the workpiece so相似形wire electrode relative movement, thus cutting out the same shape and design to the workpiece; again a digital control, the use of advanced automatic control of digital technology-driven machine tool in accordance with the pre-processing parameters according to the workpiece geometry pre-processing procedures for the preparation of a good CNC auto-complete processing, the production does not require appearance on board the need to map to enlarge map of the previous two form of control has a higher machining accuracy and a broad range of applications, both at home and abroad more than 95% have adopted WEDM NC.

根据对电极丝运动轨迹的控制形式不同，电火花线切割机床又可分为三种：一种是靠模仿形控制，其在进行线切割加工前，预先制造出与工件形状相同的靠模，加工时把工件毛坯和靠模同时装夹在机床工作台上，在切割过程中电极丝紧紧地贴着靠模边缘作轨迹移动，从而切割出与靠模形状和精度相同的工件来；另一种是光电跟踪控制，其在进行线切割加工前，先根据零件图样按一定放大比例描绘出一张光电跟踪图，加工时将图样置于机床的光电跟踪台上，跟踪台上的光电头始终追随墨线图形的轨迹运动，再借助于电气、机械的联动，控制机床工作台连同工件相对电极丝做相似形的运动，从而切割出与图样形状相同的工件来；再一种是数字程序控制，采用先进的数字化自动控制技术，驱动机床按照加工前根据工件几何形状参数预先编制好的数控加工程序自动完成加工，不需要制作靠模样板也无需绘制放大图，比前面两种控制形式具有更高的加工精度和广阔的应用范围，目前国内外95%以上的电火花线切割机床都已采用数控化。切割属电加工范畴，是由前苏联人发明的，我国是第一个用于工业生产的国家，当时由复但大学和苏州长风机械厂合作生产的这是最早的机型叫复旦型，我们国内在此基础上发展了快走丝系统。欧美和日本发展了慢走系统LS

"The pure metal is too hard to work with to have any significant uses; alloys with platinum are used in jewelry, pen points, surgical pins and pivots, electrical contacts and sparking points, and extrusion dies."

纯金属铱由于太硬而不能作任何重大的用途；铂－铱合金用于制造珠宝、钢笔尖、外科手术针、枢轴、电气接触点和发火点，以及挤压模具。

LED signboards. LED badges and belts, LED traffic lights and so on, can be used in hospitals, railway stations , banks, cinemas, highways, squares and other public places, for product promotion, sound shadow and Mao.

LED招牌。LED胸牌和腰带，LED交通信号灯等，可用于医院、车站、银行、影院、公路、广场等公共场所，作产品推广，声影并茂。

Immature inflorescence, shoot apex and immature embryo were ideal explants suitable for further transformation study.

以幼穗、茎尖和未成熟胚作外植体比较理想，可用于进一步的转化研究。

It offers seventy-five billion dollars over five years to improve health, education and security.

它会在 5 年内提供 75 亿美元用于促进作健康、教育和安全。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。