“gratonite”的概念、定义、翻译、参考文献-科学参考

单词	gratonite
释义	gratonite [`grat·ǝn´īt] ^MINERALOGY Pb₉As₄S₁₅ A mineral composed of lead arsenic sulfide, occurring in rhombohedral crystals.
随便看	ground anchor ground area ground-based navigation aid ground bed ground block ground cable ground chain ground check ground-check chamber ground circuit ground clutter ground coal ground conductivity ground control ground-controlled approach ground-controlled approach minimums ground-controlled approach radar ground-controlled interception ground-controlled intercept radar ground controller ground cover ground current ground data equipment ground-derived navigation data ground detector

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