Tree-ring width of Quercus species from historical object sample 6117B/10A, Netherlands, Zutphen@en
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Species: Quercus species; No of rings: 20; Age not determined; Pith: not applicable; Heartwood: complete; Sapwood: incomplete; Number of sapwood rings: 6; Last ring under bark: absent
物种：栎属（Quercus）物种；年轮数：20；年龄未测定；髓心：不适用；心材：完整；边材：不完整；边材年轮数：6；树皮下的最后年轮：缺失
创建时间：
2026-04-20
