“steel tunnel support”的概念、定义、翻译、参考文献-科学参考

单词	steel tunnel support
释义	steel tunnel support [`stēl `tǝn·ǝl sǝ´pȯrt] ^{MINING ENGINEERING} One of the tunnel support systems made of steel; five types are continuous rib; rib and post; rib and wall plate; rib, wall plate, and post; and full circle rib.
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