Tree-ring width of Quercus species from historical object sample 6463B/12A, N...

Species: Quercus species; No of rings: 20; Age not determined; Pith: not applicable; Heartwood: complete; Sapwood: incomplete; Number of sapwood rings: 7; Last ring under bark:...物种：栎属（Quercus）植物；年轮数：20；树龄未测定；髓心（pith）：不适用；心材（heartwood）：完整；边材（sapwood）：不完整；边材年轮数：7；树皮下的最后一轮年轮：……