Ma cellulose ethers ndi ma polima osungunuka m'madzi opangidwa kuchokera ku cellulose, polima wochuluka kwambiri m'chilengedwe. Kwa zaka zoposa 60, zinthu zosunthikazi zakhala zikugwira ntchito zambiri, kuyambira zomanga, zoumba ndi utoto mpaka zakudya, zodzoladzola ndi mankhwala....
Werengani zambiri