根据古文献可知，鸤鸠在树上养子且有“主管平均”的鸟传说。
According to ancient literature, Shijiu foster their children in trees and there goes a legend that Shijiu were in charge of evenness.
根据古文献记述，李兰秤漏很可能是使用弹簧联结权器和秤钩，以达到平均流速稳定的目的。
According to the record of ancient documents, this paper gives the possible structure of li Lan's steelyard clepsydra, and demonstrates the principle for the stabilization of average flow velocity.
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