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This paper introduced the structure and operating principle of pneumatic hammer,the selection of drilling parameter,the effect of field experiments and the existent problems. pneumatic hammer ; drilling technology,deviation prevention ; wiping

它兼容了气体钻井和冲击回转钻井的优势，其机械钻速一般比牙轮钻头回转钻井高，美国早在50年代3000~3500m深井中，成功地采用了空气锤钻井技术，而国内以前运用该技术于地质勘探、水文

Results of EBSD show that most of the reversed austenite in the steel treated by QT distribute along the grain boundary, but in the steel treated by two--phase region heat treatment the austenites distribute uniformly along all kinds of boundaries, especially also along the lath martensite boundary in the grain, so the cryogenic toughness can be also improved even the amount of austenitic is lower than that in the steel treated by QT process.

EBSD结果则表明：经两相区处理，回转奥氏体不仅在晶界和板条束界形成，也在晶内的板条界上形成，因此即便在其含量低于淬火+回火处理的条件下， 9Ni钢的低温韧性也有明显提高，证明回转奥氏体的分布也是影响9Ni钢低温韧性的一个主要因素。

We use the multilayers dielectric lens to achieve super-resolution of the tested targets. In the study of DORT, we will present the simulation results and mathematical analysis.

而在分解时间回转运算子中，关於如何由数学分析来得到侦测物体的资讯方面，也有分析与实际模拟，并且也提出了一种将超宽频讯号与分解时间回转运算子结合的分析方法。

The paper summrized lubrication technology and the selection of lubricant for rotary kiln, grate cooler, mill, conveyor mechanical equipment and large scale fan as following,(1)in rotary kiln, apply oil spoon of circulatory lubrication or pump forced oil supply system in the roller supporting mechanism and use (superscript #)680 high load industrial gear oil, and use lubrication method of idle oil wheel or spray in drive gear wheel and select solid lubricant which has high viscosity, strong adsorbability, good abrasion resistance in utmost pressure and lattic crystal structure,(2) in grate cooler, use immersion oil lubrcation in reducer and boiled oil centralized lubrication method in supporting roller and guide roller bearing, choose (superscript #)1 limit pressure lithium lubrcant grease,(3) in mill, use circulatory lubrication with fluxing oil station in drive mechanism and circulatory lubrication with high-low pressure fluxing oil station in main bearing and sliding shoe bearing and select N320 industrial gear oil.

文章全面总结了回转窑、篦冷机、磨机、输送机械及大型风机的润滑技术和润滑剂的选择。其中，(1)回转窑的托轮支承装置一般采用油勺供油的连续循环润滑方式或油泵强制供油系统，润滑油选用680重负荷工业齿轮油；传动大小齿轮的润滑一般采用带油轮或喷雾的润滑方式，润滑剂宜选用粘度高、吸附性强、极压耐磨性好、具有点阵晶体结构的固体润滑剂；(2)篦冷机中传动减速机的润滑一般采用浸油飞溅润滑；托轮，挡轮轴承的润滑一般采用干油集中润滑的方式，润滑脂一般选用锥入度310~340的1极压锂基润滑脂；(3)磨机中传动装置一般采用稀油润滑站循环润滑和冷却的方式；主轴承或滑履轴承的润滑一般采用高低压稀油润滑站循环润滑和冷却的方式，润滑油一般选用N320工业齿轮油。

In this dissertation, on the basis of the rolling principle and kinematic analysis for the drive pairs, a new idea of the revolutionary surface envelope globoidal worm gearing with rolling friction and point engagement is proposed; the point engagement theory, the engaging features, the mechanism errors and adaptation, the engaging efficiency, and the design and machining technology are systematically studied; the prototype is manufactured and the experiment is performed, and the related theory and technology are verified.

本文在对传动副实现滚动的机理及运动学分析的基础上，提出了滚动式回转面包络点啮合环面蜗杆传动的基本构思与技术框架，并深入系统地研究了滚动式回转面包络点啮合环面蜗杆副的啮合原理、啮合特性、误差敏度及适应性、啮合效率、设计和制造方法；研制了原型机并进行了原型机实验等。

At the end, the prototype of the cylindrical surface envelope globoidal worm gearing with rolling friction and point engagement is manufactured successfully and the experiment of the prototype is performed, which shows that above-mentioned theory and technology for such mechanisms are correct and feasible, and also shows that the performances for such mechanisms are largely better than other worm gearings.

最后，论文通过滚动式圆柱面包络点啮合环面蜗杆传动原型机的研制和原型机实验，验证了滚动式回转面包络点啮合环面蜗杆传动理论的正确性和技术方案的可行性，同时也进一步验证了滚动式回转面包络点啮合环面蜗杆传动优良的特性并揭示了其良好的产业开发前景。

Using the resultant motion of turning motion of rotary table and indexing motion of index head combined with gear contour machining principle.

根据鼓形齿的切削原理，利用回转工作台的回转运动和分度头分齿运动的合成，在立式铣床上加工出齿轮联轴上的鼓形齿，收到了

This vehicle adopts Yiqi Jiefang CA5275JQZ special purpose chassis which has full-view driver's cab, high pressure electric spray engine ,Euro Ⅲ emission standards, fits the requirement of the national environment protect announcement the maximum lifting capacity is 20t, the minimum working range is 3.1m, the maximum height of main boom is 31.8m, the maximum lifting height of main and jib boom comes up to 39.2m, the length of all-extended boom is 31.4m,the turning radius is 3.62m and it can 3600rotate continuously .

最大起吊重量为20吨，最小作业幅度3.1米，主臂最大起升高度31.8 米，主臂加副臂最大起升高度达到39.2米，全伸臂长31.4米，回转半径3.62米，360度连续回转。2、采用一汽解放CA5275JQZ全景驾驶室汽车起重机专用底盘，高压共轨电喷发动机，欧Ⅲ排放标准，符合国家环保公告要求。

Set thee up waymarks, make thee high heaps: set thine heart toward the highway, even the way which thou wentest: turn again, O virgin of Israel, turn again to these thy cities.

31：21 以色列民哪，你当为自己设立指路碑，竖起引路柱。你要留心向大路，就是你所去的原路。你当回转，回转到你这些城邑。

Set thee up waymarks, make thee high heaps: set thine heart toward the highway, even the way which thou wentest: turn again, O virgin of Israel, turn again to these thy cities.

021 以色列处女哪，你当为自己设立指路碑，竖起引路柱。你要留心向大路，就是你所去的原路；你当回转，回转到你这些城邑。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。