“pioneer tunnel”的概念、定义、翻译、参考文献-科学参考

单词	pioneer tunnel
释义	pioneer tunnel [´pī·ǝ`nir ´tǝn·ǝl] ^{MINING ENGINEERING} A small tunnel parallel to but ahead of a main tunnel and used to make crosscuts to the path that the main tunnel will follow.
随便看	algebraically independent algebraic closure of a field algebraic curve algebraic deviation algebraic equation algebraic expression algebraic extension of a field algebraic function algebraic geometry algebraic identity algebraic integer algebraic invariant algebraic K theory algebraic language algebraic manipulation language algebraic number algebraic number field algebraic number theory algebraic object algebraic operation algebraic scattering theory algebraic set algebraic sum algebraic surface algebraic symbol

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