流动性方面，航空航天ETF盘中换手6.39%，成交2.43亿元。拉长时间看，截至3月9日，航空航天ETF近1周日均成交4.41亿元。
This project began with a simple compass-and-straightedge 'engine', which can be found under the directory cas/.
，这一点在新收录的资料中也有详细论述
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It also trades off some privacy.