英语词汇“trackless tunneling”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典-现代词典

单词	trackless tunneling
释义	trackless tunneling trackless tunneling [′trak·ləs ′tən·əl·iŋ] (mining engineering) Tunneling by means of loaders mounted on caterpillars.
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