“room-and-pillar”的概念、定义、翻译、参考文献-科学参考

单词	room-and-pillar
释义	room-and-pillar [`rüm ǝn `pil·ǝr] ^{MINING ENGINEERING} A system of mining in which the coal or ore is mined in rooms separated by narrow ribs or pillars; pillars are subsequently worked.
随便看	tagmosis Tag-Robinson colorimeter tag sort tagua palm Tahuian taiga taiga climate tail quartzose subgraywacke quartz-pebble conglomerate quartz plate quartz porphyry quartz pressure gage quartz resonator quartz resonator force transducer quartz sandstone quartz schist quartz strain gage quartz syenite quartz thermometer quartz topaz quartz wedge quasar quasi-acoustical holography quasi-atom

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