“headtree”的概念、定义、翻译、参考文献-科学参考

单词	headtree
释义	headtree [`hed´trē] ^{MINING ENGINEERING} The horizontal timber placed at each side of a rectangular heading to support the headboard.
随便看	channel director channel effect channel-end condition channeler channel fill channel frequency channel gradient ratio channeling channeling machine channeling radiation channel iron channelizing channel-lag deposit channel light channel marker channel mask channel miles channel morphology channel-mouth bar channel net channel order channel pattern channel plate multiplier channel process channel program

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