“fragipan”的概念、定义、翻译、参考文献-科学参考

单词	fragipan
释义	fragipan [`fraj·ǝ´pan] ^GEOLOGY A dense, natural subsurface layer of hard soil with relatively slow permeability to water, mostly because of its extreme density or compactness rather than its high clay content or cementation.
随便看	power output power output tube power pack power package power plant power rating power ratio power reactor power rectifier power relay power resistor power saw power semiconductor power series power set power shovel power-shovel mining power slips power spectrum power station power steering power stroke power supply power supply circuit power-supply rejection ratio

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