“pillar drive”的概念、定义、翻译、参考文献-科学参考

单词	pillar drive
释义	pillar drive [`pil·ǝr ´drīv] ^{MINING ENGINEERING} A wide irregular drift or entry, in firm dry ground, in which the roof is supported by pillars of the natural earth, or by artificial pillars of stone, no timber being used.
随便看	radial stress radial symmetry radial tire radial triangulation radial velocity radial wave equation radian radiance radiancy radian frequency radian length radiant radiant density radiant efficiency radiant emittance radiant energy radiant-energy thermometer radiant exitance radiant exposure radiant flux radiant flux density radiant heating radiant intensity radiant power radiant quantities

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