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将原木或原条按树种、材种、规格和等级的一部或全部进行分类的作业,又称品等区分。选材有利于木材的贮存、保管、运输和利用木材,是森林采伐运输生产中的主要工序之一。
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China-Soviet Exchanged Notes on Resuming Diplomatic Relations
China-Soviet rubber cooperation
China space activities
China Sporting Goods Federation
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China Sport Science Society
China Sports Culture Exposition
China Sports Daily
China Sports Foundation
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China's Postgraduate Class for Excellent Youth Peking Opera Performers
China's principles of wild animal management
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China Stabilization Fund (1939)
China Standard Book Number
China Standard Link Identifier (ISLI)
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更新时间:2025/12/5 14:08:28