“Middle Pennsylvanian”的概念、定义、翻译、参考文献-科学参考

单词	Middle Pennsylvanian
释义	Middle Pennsylvanian [`mid·ǝl ´pen·sǝl`vā·nyǝ] ^GEOLOGY The geologic epoch between the Upper and Lower Pennsylvanian.
随便看	injection-fluid front injection gas-fluid ratio injection gneiss injection grid injection laser injection locking injection luminescent diode injection mold injection molding injection pressure injection pump injection ram injection signal injection temperature injection well injection-well plugging injective mapping injectivity index injectivity test injector injector torch injury injury current injury potential ink

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