“Joy-Sullivan hydrodrill rig”的概念、定义、翻译、参考文献-科学参考

单词	Joy-Sullivan hydrodrill rig
释义	Joy-Sullivan hydrodrill rig [`jȯi `sǝl·ǝ·vǝn `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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