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[ÇóÖú] Ë­°ïÎÒÏÂÏÂÕâÆªÎÄÕÂBending Vibration and Whirling Motion of Drill Collars

Vandiver J K, James W N, Shyu R J. Case Studies of the
Bending Vibration and Whirling Motion of Drill Collars.
SPE Drilling Engineering, 1990(12):282~290
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