“optional features”的概念、定义、翻译、参考文献-科学参考

单词	optional features
释义	optional features 选定的特性
随便看	channel test channel thread channel tie channel tile channel transistor channel transmission channel trap channel travel isochrone channel travel isochrone chart channel travel time channel trigger circuit channeltron channel tunnel channel type electron multiplier channel type jig channel-type terrace channel type terrace channel unit channel unit address channel vecoder channel wave channel waveguide channel widening channel width channel-width variation

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