短語詞組短語cocoon missed filament 落繭size of cocoon filament 繭絲纖度cocoon filament quality 登蔟效率tenacity of cocoon filament 繭絲強(qiáng)力length of cocoon filament 蠶絲長cocoon filament weight 繭絲量cocoon filament size curve 繭絲纖度曲線elongation of cocoon filament 繭絲伸度cocoon filament size 繭絲纖度 返回 cocoon filament