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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