“gravel pump”的概念、定义、翻译、参考文献-科学参考

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单词	gravel pump
释义	gravel pump 砂砾泵
随便看	rate of biodegradation rate of body weight gain rate of both profits and taxes on entire funds rate of brain retention rate of braking rate of burning rate-of-burning test rate of call rate of camber change rate of capillary rise rate of capital turnover rate of change rate-of-change circuit rate-of-change curve chart rate of change curve chart rate-of-change indicator rate-of-change map rate of change of acceleration rate of change relay rate-of-change relay rate-of-change sensor rate of charge rate of charging rate of chickens rate of chronometer