míngchèn: zhèng guó qú gǔ dài guān zhōng píng yuán shàng de rén gōng guàn gài qú Zheng drainage canal ancient Guanzhong irrigated plains xiàngguāncítiáo: zhèng guó qú : gǔ dài guān zhōng píng yuán shàng de rén gōng guàn gài qú xiàngguāntúpiàn: zhèng guó qú gǔ dài guān zhōng píng yuán shàng de rén gōng guàn gài qú Zheng drainage canal ancient Guanzhong irrigated plains zīliàoláiyuán: http://economy.guoxue.com/ túpiànmiáoshù: 　　chūn qiū zhàn guó zhì nán běi cháo guàn gài qú xì gōng chéng de fā zhǎn qíng kuàng _ zhōng guó jīng jì shǐ lùn tán yóu shàng kě zhī， liǎng hàn shí qī yóu yú dà yī tǒng dì / 2 túpiàn

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