Reel off the raw silk fiber from the cocoons.

把丝从蚕茧中抽出来.

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How each silk worm produces over 2 km long silk fiber.

每一只蚕如何能够产生超过2公里长的丝蛋白纤维.

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There are some differences in microstructure and thermal property of silk fiber among different cocoon layers.

各茧层蚕丝纤维的微细结构和热性能有一定差异.

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