英语词汇“pillar-and-room system”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	pillar-and-room system
释义	pillar-and-room system pillar-and-room system [′pil·ər ən ′rüm ‚sis·təm] (mining engineering) A system of mining whereby solid blocks of coal are left on either side of working places to support the roof until first-mining has been completed, when the pillar coal is then recovered.
随便看	nano-opto-electro-mechanical systems nanoos nano-oxide layer nanopaint nanoparticle nanoparticle albumin-bound nanoparticle-enhanced spectroscopy nanoparticle ensemble nanoparticle information library nanoparticle production core facility nanoparticles nanoparticulate nanoparticulates nanopen reader and writer nanophanerophyte nanophase nanophase material nanophase materials nanophase metal nanophase technologies corporation nano-photonics technology center nanophthalmia nanophthalmic uveal effusion syndrome nanophthalmos nanophthalmus

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