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Labor
The body of persons, or the human physical and mental effort, engaged in the production of goods and services.
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纖維飽和點
Construction; Carpentry
階段的乾燥或濕潤的纖維細胞壁飽和和細胞腔都是水的木材的免費。假定為 30%的水分含量,基於烘箱乾燥重量。收縮就會發生。當木降到了這一點。 ...