An Apparatus Is Used With A Drilling Assembly For Drilling A Borehole. The Drilling Assembly Has An Impact Device Linked To A Drill Head. The Impact Device Is Powered By A First Fluid Under A First Pressure To Impart A Percussive Force To The Drill Head. The Percussive Force Is A Function Of The Fir.....
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Location positioning in wireless networks
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Reduced instruction set television control system and method of use
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The invention proposes the adding ay to the insidof a small time-dele differential link of a PID controller. The differential action efficiency is satisfactory when the time delay is little. In case the time delay is large, the differential action work will switch to the proportional control operati.....
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