“Headwork of Zhengguo Canal”的概念、定义、翻译、参考文献-科学参考

单词	Headwork of Zhengguo Canal
释义	Headwork of Zhengguo Canal Encyclopedia 历史学其他遗址释 Headwork of Zhengguo Canal郑国渠首遗址中国战国时期韩国水工郑国于秦王政元年（公元前246）主持修建的引泾灌溉工程郑国渠的渠首工程遗址。
随便看	observation of navigation obstruction observation of reservoir sediment observation of seismic response of structures observation of slope stability observation of surrounding rock structure observation platform observation point control observation process observation route control observation scheme observation technology of gravity tide observation technology of strain tide observation, thinking and experiments observation vector observation window Observatoire de Paris Observatoire de Paris，PSL/Paris Observatory Observatoire Royal de Belgique Observatoire Virtuel France Observatorio del Roque de los Muchachos Observatorio del Teide Observatory observatory Observatory as a Mystical Graden Observatory at Nice

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