The results show that longitudinal vibration of drill string is relative to rotary speed and weight on bit (WOB).

实验结果表明，钻柱的纵向振动主要与转速和钻压有关。

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Design idea and development method of a microcomputer control system for optimization WOB (weight on bit) automation bit feed of oil rig disc brake is discussed.

阐述了盘式刹车钻压优化自动送钻微机控制系统的设计思想和研制方法，给出了系统的软硬件设计方法。

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The result of experiment shows that the effect of weight on bit on the torque is different for two different conditions of surface scraping rock break and volume break.

分析试验结果得出，对于表面刮削破碎和体积破碎两种岩石破碎状态，钻压对扭矩的影响不一样。

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In a similar sense, when we do cellular research for even -- like for cancer research, for instance, on Earth the cells actually collapse under their own weight and so their growth on Earth are a little bit distorted.

WHITEHOUSE: President Obama's call to the International Space Station

This was a bit of a bearish weight on gold and silver Monday.

FORBES: P.M. Kitco Metals Roundup: Comex Gold Sees Mild Losses On Profit Taking

This is a bit of a bearish weight on gold and silver Monday.

FORBES: Comex Gold Weaker On Profit Taking, Bearish "Outside Markets"