【摘要】 指出了建筑用铝型材外观常见缺陷产生的两种原因，对每一种缺陷的特点、成因进行了论述，并提出对策。更多还原

【Abstract】 Two reasons accounting for the common defects on the surface of aluminum sections for building use are pointed out. Features and causes of each of the defects and countermeasures against them are discussed.更多还原