英语词汇“german tubbing”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	german tubbing
释义	German tubbing German tubbing [¦jər·mən ′təb·iŋ] (mining engineering) A form of tubbing, with internal flanges and bolts, for lining circular shafts sunk through heavily watered strata.
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German tubbing