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- It is summarized and analyzed the strength characteristic of andesite and the principium of destroying rock of roller bit,take andesite for example. 以安山岩为例,总结和分析了安山岩的强度特性以及组合牙轮钻头的破岩机理。
- The operating performance quality of the roller bit, which is the most main broken crag tool, directly influence the well drilling quality, well drilling efficiency and well drilling cost. 牙轮钻头是钻井工程中最主要的破岩工具，其工作性能的好坏直接影响钻井质量、钻井效率和钻井成本。
- Geometric design of cross roller based on MDT 基于MDT的轧辊几何设计
- Study of Single Spherical Roller Bit 单牙轮钻头研究
- STUDY ON BELLEVILLE RING SEAL OF ROLLER BIT 牙轮钻头碟形圈密封的试验研究
- Keywords drillability;logging data;roller bit; 可钻性;测井资料;牙轮钻头;
- Construction machinery single row cross roller(cone)slewing rings 建筑机械用单排交叉滚柱(锥)式回转支承
- He bit off a large piece of the apple. 他咬下一大块苹果。
- She was a bit queer after her husband deserted her. 她遭丈夫遗弃後精神有点失常。
- It is rash to cross the street without looking both ways. 不朝两边看看就穿马路是莽撞的。
- Cross and angry words in family grate upon the ear. 不高兴与生气的话在一个家庭里令人不愉快。
- Sealing mechanism of metal face seals for roller bit 牙轮钻头单金属浮动密封结构的密封机理
- I reckon the girl is a little bit boyish. 这想这个女孩有点男孩子气。
- Study on Roller Bit Rock-Breaking Power in Vertical Wells 直井牙轮钻头碎岩功率研究
- A mule is a cross between a horse and an ass. 骡是马和驴交配而生的杂种。
- The Red Cross dealt out food to hungry soldiers. 红十字会把食物分发给饥饿的士兵。
- The seedling have shrivel up a bit in the hot sun. 在炎热的太阳光下，幼苗已有一点乾枯。
- Crossed Roller Level Z-Axis Stage 交叉滚子型水平面Z轴滑台
- This cross marks the spot where she died. 这个十字符号标明她死去的地点。
