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Homology of wood. Furthermore twelve elastic contants of Beula platyphylla Suk. Specimens were measured in the condition of tempeture 10C and relative humidity 60%. 木材的均勻連續(xù)性以后，測定出白樺試件在10℃、相對濕度為60%25時的一些基本的力學(xué)參數(shù)。