This paper concerns the rational selection type of secondary logging in Heilongjiang forest area by productivity and productive cost.
这篇文章通过生产率和生产成本讨论了黑龙江林区二次集材选型问题。
This paper concerns the rational selection type of secondary logging in Heilongjiang forest area by productivity and productive cost.
这篇文章通过生产率和生产成本讨论了黑龙江林区二次集材选型问题。
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