din 16742 是公差标准,16472不是公差标准
DIN 16742 Plastics moulded parts - Tolerances and acceptance conditions
塑料成型件 - 公差和验收条件
DIN EN ISO 16472 Animal feeding stuffs - Determination of amylase-treated neutral detergent fibre content (aNDF) (ISO 16472:2006)
塑料 - 用于人工方法加速使用中压汞蒸气灯的光老化