| 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. |
| 随便看 |
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