whatsapp: +86 13805212761 http://www.mit-ivy.com mit-ivy kev lag luam tuam txhab DSD acid (4,4 diaminostilbene mono-2,2 bisulfonic acid) yog ib qho tseem ceeb dye intermediate, feem ntau yog siv los tsim fluorescent brighteners, ncaj qha khov daj G, ncaj daj R, tshav ntuj-resistant txiv kab ntxwv F3G thiab ntsaum ...
Nyeem ntxiv