“column drill”的概念、定义、翻译、参考文献-科学参考

单词	column drill
释义	column drill [`käl·ǝm ´dril] ^{MECHANICAL ENGINEERING} A tunnel rock drill supported by a vertical steel column.
随便看	Little Dipper little-drop technique Little Fox little giant Little Horse Little Ice Age Little John little leaf little peach disease Little Ruler Little's disease Littlewood conjecture littoral current littoral drift littoral sediments littoral transport littoral zone Littorinacea Littorinidae Littrow grating spectrograph Littrow mounting Littrow prism Littrow quartz spectrograph lituate Lituolacea

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