109 comments

  1. Mau tanya min kalau mau beli N-1-napthyl-ethylen-
    diamindihydrochlorid (C12H16Cl2N2) 1 gram bisa gak pak?

  2. MAS KRISNA SAYA MAU TANYA MASKRISNA ADA BAHAN CAIRAN KIMIA YG BISA KOROSIF KE GRANIT /KERAMIK LANTAI

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