“drummy”的概念、定义、翻译、参考文献-科学参考

单词	drummy
释义	drummy [`drǝm·ē] ^{MINING ENGINEERING} Loose rock or coal, especially in a mine roof, that produces a hollow, weak sound when tapped with a bar.
随便看	azulene azulite azure B azurite azurmalachite Azusa azygospore azygos vein azygote aΩ aΩcm B b Ba Baade's window babassu oil babbitt metal babble babble signal Babcock coefficient of friction Babcock magnetograph Babcock test Babesia babesiasis Babesiidae

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