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Zhengzhou longfield international Co., Ltd
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Inorganic Salt
Inorganic Salt(5)
Organic Acid(4)
Resin(3)
Inorganic Acid(1)
Rubber Materials(1)
Oxide(1)
Leather(1)
Organic Salt(1)
synthetic cryolite
Borax
STPP
Sodium Thiosulfate
Sodium hydrosulphite