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当前,市场上各种纤维制品和毛制品品种纷呈,名类繁多,单凭肉眼观察和标签说明,很难准确辨认。但由于各种纤维燃烧时的速
At present, there are many varieties of various types of fiber products and wool products on the market, which are difficult to accurately identify by naked eyes and labeling. But due to the speed at which various fibers burn