“timber mat”的概念、定义、翻译、参考文献-科学参考

单词	timber mat
释义	timber mat [`tim·bǝr `mat] ^{MINING ENGINEERING} Broken timber forming the roof of an ore deposit that is being extracted by a caving method, such as top slicing.
随便看	alphameric typebar alphamosaic technique alphanumeric characters alphanumeric display device alphanumeric grid alphanumeric instruction alphanumeric pager alphanumeric reader alpha olefin alpha particle alpha-particle detector alpha-particle scattering alpha position alpha ray alpha-ray vacuum gage alpha receptor alpha rhythm alpha rule alphascope alpha system alpha taxonomy alpha test alpha test site alphatopic alphatron

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