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羽绒-羽绒是长在鹅、鸭的腹部，成芦花朵状的绒毛，成片状的叫羽毛。由于羽绒是一种动物性蛋白质纤维，比棉花(植物性纤维素)保温性高，且羽绒球状纤维上密布千万个三角形的细小气孔，能随气温变化而收缩膨胀，产生调温功-yurong</br> generated by yvsou girl
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(28.56701.236.7261.7281.7321)
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(28.56701.236.7261.7281.7321)