夏令服装的确以丝绸织品为最理想。
纺织物料：作书壳包面用的真棉布，麻布及丝绸织品。
Woven material: Genuine cloth of cotton, linen and silk, used for case covering.
在世界上最具影响力的说法，是中国科学家在1958年考古发现的，距今5300年（ 大汶口文化时期）的丝绸织品。
The 5300-year old silk fabrics (from the Dawenkou Culture period), which was discovered by Chinese archaeologists in 1958, have become one of the most influential parlance in the world.
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