“aven”的概念、定义、翻译、参考文献-科学参考

单词	aven
释义	aven [`av·ǝn] ^GEOLOGY See <<pothole>> ^{MINING ENGINEERING} A vertical shaft leading upward from a cave passage, sometimes connecting with passages above.
随便看	spruce spruce oil spruce sulfite extract sprue sprue bushing sprue gate sprue puller sprung axle sprung weight SPST spud spudded-in Spumellina spun glass spun rayon spun silk spun yarn spur spur blight spur dike spur gear spurious correlation spurious disk spurious emission spurious modulation

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