Demonstrate how to say (用以制造子午线轮胎及防弹背心等轻质高强度合成纤维)芳族聚酰胺 in Mandarin Chinese »
Practice saying (用以制造子午线轮胎及防弹背心等轻质高强度合成纤维)芳族聚酰胺 in Mandarin Chinese »