It is difficult to wash by usual method the filthy which is a compound hardened dirty mainly composed of Ca and Mg in alcohol distillation equipments.

• 甘蔗糖蜜酒精蒸馏设备的积垢,是一种以各种钙、镁盐为主的复合重硬垢,用常规的清洗方法难以凑效。