英语词汇“holman counterbalanced drill 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	holman counterbalanced drill rig
释义	Holman counterbalanced drill rig Holman counterbalanced drill rig [′hōl·mən ¦kau̇nt·ər‚bal·ənst ′dril ‚rig] (mining engineering) A drill rig consisting of a rail-track carriage with a counterbalanced boom 10 feet (3 meters) long.
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Holman counterbalanced drill rig