英语词汇“joy-sullivan hydrodrill rig”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	joy-sullivan hydrodrill rig
释义	Joy-Sullivan hydrodrill rig Joy-Sullivan hydrodrill rig [′jȯi ′səl·ə·vən ′hī·drō‚dril ‚rig] (mining engineering) A drill rig set on a jib or boom which can be moved to and locked in any position by hydraulic power controlled from the drill carriage.
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Joy-Sullivan hydrodrill rig