Tree-ring width from historical object sample 5706B/09M, Netherlands, Groningen
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Species: not given; No of rings: 84; Age not determined; Pith: not applicable; Heartwood: absent; Sapwood: absent; Number of sapwood rings: 0; Last ring under bark: absent
物种：未提及；年轮数量：84；年龄未测定；髓心（pith）：不适用；心材（heartwood）：缺失；边材（sapwood）：缺失；边材年轮数量：0；树皮下的最后一轮年轮：缺失
