Amavuta y'ibishyimbo biribwa cyane mu gihugu no hanze yacyo hamwe n'umusaruro munini no kugurisha. Vuba aha, dukurikije isoko ku isoko kandi twifashishije ikoranabuhanga ryateye imbere mu gihugu ndetse no hanze yarwo, twateje imbere urusyo rwa colloid, ibikoresho by'ibanze by’umurongo w’amavuta y’ibishyimbo, a ...
Soma byinshi