“four-piece set”的概念、定义、翻译、参考文献-科学参考

单词	four-piece set
释义	four-piece set [¦fȯr ¦pēs `set] ^{MINING ENGINEERING} Squared timber frame used in underground driving to give all-around support to weak ground.
随便看	cetane index cetane number cetane-number improver cetin cetology Cetomimiformes Cetomimoidei Cetorhinidae cetrimonium bromide Cetus cetyl cetyl alcohol cetyl vinyl ether Ceva's theorem cevedilla cevian ceylonite Cf C factor CFC CFIA C figure cfs cg CGI

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