“leading heading”的概念、定义、翻译、参考文献-科学参考

单词	leading heading
释义	leading heading [`lēd·iŋ `hed·iŋ] ^{MINING ENGINEERING} 1. The heading of a pair of parallel headings that is a short distance in front of the other; used to drain a mining area. 2. A heading dug into the solid coal before the advance of the general face.
随便看	seriate sericeous sericite sericitic sandstone sericitization sericulture series series circuit series compensation series connection series decay series disintegration series excitation series-fed vertical antenna series feed series firing series generator series loading series modulation series motor series multiple series-parallel circuit series-parallel control series-parallel firing series-parallel switch

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