“Holman dust extractor”的概念、定义、翻译、参考文献-科学参考

单词	Holman dust extractor
释义	Holman dust extractor [`hōl·mǝn `dǝst ik´strak·tǝr] ^{MINING ENGINEERING} A dust-trapping system in which the dust and chippings from percussive drilling operations are drawn back through the hollow drill rod and along a hose to a metal container with filter elements.
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