whatsapp:+86 13805212761 http://www.mit-ivy.com mit-ivy industry company DSD acid (4,4 diaminostilbene mono-2,2 bisulfonic acid) yidayi ebalulekileyo ephakathi, esetyenziswa ikakhulu ukwenza izikhanyisi ezikhanyayo, ngqo Umthubi onomkhenkce u-G, umthubi othe ngqo ongu-R, i-orenji enganyangekiyo ekukhanyeni kwelanga yi-F3G kunye nembovane...
Funda ngokugqithisileyo