“face timbering”的概念、定义、翻译、参考文献-科学参考

单词	face timbering
释义	face timbering [`fās `tim·bǝ·riŋ] ^{MINING ENGINEERING} Positioning of safety posts at the working portion of a coal face to support the roof of the mine.
随便看	benzyne Beranek scale beraunite berbamine Berberidaceae berberine Berenice's Hair beresorite ber function bergamot oil berg crystal Bergeron-Findeisen theory Bergius process Bergmann's rule Bergman-Turner unit bergmehl bergschrund Berg's diver method berg till beriberi Bering Sea Berkefeld filter berkelium berkeyite berlinite

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