Meaning of どうさげんり in Japanese

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Definition of どうさげんり

どうさげんり(dousagenri) 【動作原理】

(n) operating principles
壊れたラジオを修理していて、回路の動作原理を理解できていないことに改めて気がつきます。
Repairing a broken radio I realise over again that I don't have an understanding of the operating principles of circuitry.