久久国产欧美日韩精品,日韩国产精品久久久久久亚洲,99视频精品全部免费免费,91精品国产综合久久走光

“棉束”的英語可以翻譯為：flock ...

用于測定棉束纖維斷裂強度和斷裂伸長率.Used for testing cotton fibre bundle's breaking strength and elongation at break.錫林金屬針布中嵌入了棉束.Cluster of cotton embedded on cylinder wires....