万科精装修的房子:what is "alum"

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i need help. can some body answer me!

白矾
任何各种各样双重硫化一种三价金属譬如铝, 铬, 或钢 和一种金属譬如钾或钠, 特别是铝钾硫化, AlK(SO4)2.12H2O, 在工业上广泛用作沉淀剂、硬化剂和净化剂，医学上用作局部收敛剂和止血剂

明矾

what is "alum" What is "RMPS"? What is "pascal" what is "kogoo"? What is "FB"? What is mean?"legend" what is "pink collar"? What is opposite to "live"? what is "b-boy"? What is "old Faithful"?