“head gate”的概念、定义、翻译、参考文献-科学参考

单词	head gate
释义	head gate [`hed ´gāt] ^{CIVIL ENGINEERING} 1. A gate on the upstream side of a lock or conduit. 2. A gate at the starting point of an irrigation ditch. ^{PETROLEUM ENGINEERING} The gate valve that is installed nearest the pump or compressor on oil or gas lines.
随便看	injection electroluminescence injection fluid 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

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