英语词汇“useful time”的读音、翻译、释义、用法及例句-开邑网

词汇	useful time
释义	useful timeuseful time1.■使用寿命
随便看	gas probe gas-processing gas processing plant gas producer gas-producer coal tar gas producer retort gas-producer vehicle gas producing bacteria gas-producing factor gas-producing plant gas-producing process gas producing well gas production gas productivity index gas projection gas projector gasproof gas proof curtain gas proofing gas-proof machine gas proofness gas-proof sealing gas propellant rocket gas proportional counter gas proportional scintillation counter

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