Chemicals used for treatment of water intended for human consumption - disodium dihydrogen pyrophosphate 人类生活用水处理用化学制品.焦磷酸二氢二钠
3.
Chemicals used for treatment of water intended for human consumption - disodium dihydrogen pyrophosphate ; german version en 1205 : 2005 人类生活用水处理用化学制品.焦磷酸二氢二钠