DIN EN ISO 4064-4:2014 可饮用冷水和热水表. 第4部分: ISO 4064-1未述及非计量要求 (ISO 4064-4-2014); 德文版本EN ISO 4064-4-2014
Water meters for cold potable water and hot water - Part 4: Non-metrological requirements not covered in ISO 4064-1 (ISO 4064-4:2014); German version EN ISO 4064-4:2014