It cannot be utilised unless air dried to reduce moisture content to 30 % or less.
它不能利用，除非风干，以减少水分含量30%或以下。
In this paper, the moisture content and its distribution of each growth ring in air dried wood specimens have been tested by using X-ray scanning densitometer.
用X射线扫描密度计测量气干材含水率及其每一年轮的水分分布。
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