Kuviika kwachitsulo ndi mtundu watsopano waukadaulo wazitsulo wotsutsana ndi dzimbiri.Ukadaulo woviika wa pulasitiki ndi chitukuko chatsopano chaukadaulo wa anti-corrosion komanso kugwiritsa ntchito kwatsopano kwa zida za polima.Zopangidwa ndi pulasitiki zimaphatikiza minda monga misewu yayikulu, njanji, kasamalidwe kamatauni, minda, ulimi ndi ...
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