乔木（树高10-25m，胸径15-40cm）
Tree ((height10-25m, Diameter at breast height15-40cm
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树皮中等厚（皮厚5-10mm）
Bark thickness moderate (thickness 5-10mm)
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外皮不规则裂
Outer bark irregular fissured
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内皮石细胞及花纹不见
Stone cell and figures on inner bark don’t be obvious
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材表灯纱纹
Fine holes of “linen” in log surface
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中国西北
Northwest China
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中国西南
Southwest China
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中国东南沿海
Southeast China
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长江以南各省区
Each province, region in south of Yangze River
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日本
Japan
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中国华北
Northern China
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