be free from defects in material and workmanship

be free from defects in material and workmanship
be free from defects in material and workmanship

be free from defects in material and workmanship
避免材料和工艺的缺陷

无缺陷的材料和工艺

避免材料和人工的瑕疵

避免材料和工艺的缺陷