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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Swivel (drill rig) ： ウィキペディア英語版 Swivel (drill rig) A (Swivel ) is a mechanical device used on a drilling rig that hangs directly under the traveling block and directly above the kelly drive, that provides the ability for the kelly (and subsequently the drill string) to rotate while allowing the traveling block to remain in a stationary rotational position (yet allow vertical movement up and down the derrick) while simultaneously allowing the introduction of drilling fluid into the ''drill string''. See Drilling rig (petroleum) for a diagram of a drilling rig. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Swivel (drill rig)」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.