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- The heavyset gage design provides for long runs on sreerable systems ghrough hard and abrasive formations. 高强度的规径设计使其在含一定研磨性的硬地层中导向钻进可获得长寿命。
- New type PDC cutters and heavyset gage design promote longer bit life in hard and abrasive formations. 新型切削齿及高密度保径布齿提高钻头在硬研磨性地层中的使用寿命.
- Spiral gage improves bit guiding ability, extends bit life through abrasive formations and hard interbedded layers. 螺旋保径在研磨性地层及夹层中钻进可改善钻头的导向性;延长钻头寿命.
- Cubic borazon has been developed as an ideal hard abrasive due to its high hardness, high thermal stability and high chemical inertia properties. 立方氮化硼因其具有“三高”特性,而成为一种理想的硬磨料得以发展。
- Results show that martensitic ductile iron under high stress two-dody abrasion with soft abrasive is worn out by fatigue mechanism and with hard abrasive, the cutting mechanism. 结果表明:在软磨料作用下的高应力两体磨损中,马氏体球铁以疲劳机制破坏,硬磨料作用下以切削机制破坏;
- Deep blade configuration makes possible high rates of ROP in soft to medium formations and effective cooling in harder,more abrasive formations. 深刀翼布置使其在软至中硬地层中获得高钻速，在硬且有一定研磨性的地层中有效地冷却钻头。
- Deep blade configuration makes it possible to obtain high ROP in soft to medium formations and effective cooling in harder and more abrasive formations. 深刀翼使其可能在钻软至中硬地层中获得高钻速;并在有一定研磨性的硬地层中有效地冷却钻头.
- It is hard to sleep without a cooler in this room. 没有空气调节器，在这间屋里很难入睡。
- The attack is to wipe out data, to delete flies, or to format the hard disk. 常见的攻击方式是消除数据、删除文件或者格式化硬盘。
- John felt it hard to rig out his family. 约翰感到难以为一家大小置备衣着。
- The hard core in the party make all the decisions. 这个党的核心成员决定一切。
- Hard copy is computer output on paper, printing or graphics. 硬拷贝是出现在纸上、印刷上或图表上的电脑输出。
- I scrubbed hard at the stain to see if I could get it off. 我使劲擦这个污迹，看能不能将它去掉。
- It's natural to slack2 off towards the end of a hard day's work. 一天紧张工作快结束的时候有些放松是自然的。
- He pushed hard on the brake pedal to avoid a collision. 他使劲踩下煞车踏板以避免撞车。
- One can not learn a language well unless one works hard. 学好一种语言非下苦功不可。
- Let's collect the sap before its consolidation into a hard mass. 让我们在树液坚固成团之前将之收集起来。
- He owes his opulence to work hard. 他的财富乃辛勤工作得来。
- She was trying hard to disgorge a fish bone. 她拚命想把鱼刺吐出来。
