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- The Coupling Function Analysis of the Thread-locking Ring of Rock Roller Bit 牙轮钻头螺纹锁紧环连接性能影响分析
- rock roller bit 牙轮钻头,岩石齿轮钻头
- 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。
- Dandong Modern Rock Roller Factory, Dandong Modern Paper Machinery Co Ltd is located at the north bank of Huanghai Sea and the bank of Yalu River. 丹东现代石辊厂丹东现代造纸机械有限公司座落在山清水秀的黄海大东港北岸,风景如画的鸭绿江畔,与朝鲜隔江相望,是一睹异国风光、异国情俗的旅游胜地。
- 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。
- Study of Single Spherical Roller Bit 单牙轮钻头研究
- He dash the glass bowl to bit on a rock. 他对著石块把玻璃碗砸得粉碎。
- 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;
- The rock was honeycombed with passages. 岩石上有许多蜂窝状的小孔。
- 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
- Many young rock hounds grow up to be geologists. 许许多多爱好收集岩石的少年,长大后成了地质学家。
- Study on Roller Bit Rock-Breaking Power in Vertical Wells 直井牙轮钻头碎岩功率研究
- The climber had to negotiate a steep rock face. 那攀登者得攀越一陡峭岩石。
- Laboratorial Research on Roller Bit Colliding with Borehole Wall 牙轮钻头与井壁碰撞的室内实验研究
- This layer of rock contains a lot of flint. 这一岩层中有大量燧石。
- The ride on the roller coaster dizzied us. 乘坐云霄飞车使我们头晕。
- The water had worn a channel in the rock. 水把岩石冲出了一条沟。
- The mountain rise up in a steep wall of rock. 这座山高而陡,形成一道岩石屏障。
- May I borrow your roller skates? 我可以借你的旱冰鞋吗?