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With the geometry model of the roller cone rock bit and kinematics model, by setting up rock failure model of bottom rock and interaction model between teeth and rock, the interaction dynamic modeling of Bits and rock is established in the process of petroleum drilling.

本文对在钻井过程中由于牙轮钻头与岩石互作用及钻柱的弹性变形导致牙轮钻头和钻柱在钻井过程的振动问题进行了深入地分析研究。

After 17 bits (or 17 times the number of DS1267s in the daisy chain), the data has shifted completely around and back to its original position.

经过17位（或17倍，在菊花链中的DS1267s数），数据已经完全转向周围，回到原来的位置。

Henan Zhecheng Jingxin Diamond Abrasive CO.,LTD.established in June 1990, is special in producing synthetic diamond powder coated diamond (Ni、Cu、Ti,synthetic diamond micro-powder and superfine power, the whole-type man-made diamond materials, RVD Synthetic Diamond , Diamond Micron Powder , Cubic Boron Nitride Crystal , Cubic Boron Nitride Crystal and diamond toolsPolycrystalline Diamond (PCD,Diamond Grinding Wheels,Diamond Grinding Wheels Diamond Segments ,Diamond/ PCD Wire Drawing Die Blanks,Flexible Polishing Pad,Brick Polishing Pad ,Diamond Cup Wheels,Diamond Core Bits,Diamond Core Drills, Electroplated Diamond Tools .

供应金刚石微粉，软磨片河南柘城晶鑫超硬磨料制品有限公司创建于1990年6月，现有员工150人，产品有6大类。70个品种，主导产品有人造金刚石和金刚石制品（各种型号金刚石，人造金刚石、电镀金刚石，金刚石软磨片，人造金刚石微粉和超细粉、人造金刚石整型料破碎料RVD、研磨膏、聚晶PCD。

Plate, diamond tools graphite mold, sinter mold geological drill bits, industrial furnace, hot isostatic pressing equipment A variety of graphite heating elements, a variety of body heat, heater and production of monocrystalline silicon heater and shield, etc..

条。板，金刚石工具石墨模具、地质钻头烧结模具、工业电炉、热等静压设备的各种石墨发热元件、各种发热体、加热器及生产单晶硅的加热器和屏蔽罩等。

Diamond grinding wheels, diamond core bits and tuck point saw blades also can be supplied as well.

木工圆锯片有切木片、切有色金属片、割草片、有大力磨、自动磨等生产线。

Sheet metal and wire mesh become the cross, and metal bits left from a die cutter complete the sculpture.

钣金网成为两岸和金属钻头左从模具刀具完成雕塑。

Rongxiang company mainly engaged in: Die spring:(Japan Tama, the East, Ko superior force, AAA;) and Cutting Tools:(tungsten steel cutter, tungsten coated steel knife, the Japanese silk attack , Banya, Dao, knife tablets, shaving heads, cutter knives, bits, turning tools;) adequate inventory, fast delivery.

荣祥公司目前主要经营：模具弹簧：(日本多摩，东发，柯优力，AAA；)和切削刀具：(钨钢铣刀，钨钢涂层刀，日本丝攻，板牙，刀把，刀粒，刀头，绞刀，钻头，车刀；)库存充足，交货快捷。

Milling machine, lathe, drill press, grinder, sparks machine accessories: universal dividing head, sub-dial, tilt angle plate, three-jaw lathe, four claw chuck alloy top, activities leading, single two-way Punch Former, and molybdenum wire , G word folder, UHT pneumatic tools, drill bits folder, wheel machines, grinding machines, degaussing devices, tools, Motorola, angle pads regulation, sinusoidal magnetic Units, sinusoidal regulation, Dresser, and Punch Grinding Machine, Plastic Punch , and the balance Units, such as the electrode rods.

铣床、车床、钻床、磨床、火花机配件：万能分度头、分度盘、倾斜式角度盘、车床三爪、四爪卡盘、合金顶尖、活动顶尖、单双向冲子成型器、钼丝、G字夹、UHT气动工具、钻头夹、砂轮机、磨针机、消磁器、工具万力，角度垫规、正弦磁台、正弦规，砂轮修整器，冲子研磨机、冲子整形器，平衡台，电极棒等。

The main products have the overall carbide drill bits, milling cutter, reamer, BORING, T-type milling cutter, drill sets as well as the kinds of non-standard alloy cutting tools.

主要产品有整体硬质合金钻头、铣刀、铰刀、镗刀、T型铣刀，合金钻套以及各种非标刀具。

Our company manufactures varieties of drill bits: Full Ground drills, polish drills, 1/2 shank drills, extension drill, wood working drill, asonry drills and so on.

公司自创建十余年来始终坚持&质量第一，用户至上&的宗旨，为广大国内外客商提供质量稳定可靠的产品。

In other research, chondroitin is being investigated for use in several other conditions.

在其它研究，软骨素被调查用於几个其它情况。

They would make fun of him for having to work.

他们拿他的工作来开玩笑。