“pillar-and-breast system”的概念、定义、翻译、参考文献-科学参考

单词	pillar-and-breast system
释义	pillar-and-breast system [`pil·ǝr ǝn `brest ´sis·tǝm] ^{MINING ENGINEERING} A system of coal mining in which the working places are rectangular rooms usually five or ten times as long as they are broad, opened on the upper side of the gangway.
随便看	detonating agent detonating fuse detonating net detonating primer detonating rate detonating relay detonation detonation flame spraying detonation front detonation wave detonator detonator safety detonics detorsion detoxification detrainment detrital fan detrital minerals detrital ratio detrital remanent magnetization detrital reservoir detrital sediment detritus detritus feeder detritus tank

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