Zikafika pamakina opangira zida, zomangira za HDPE (high-density polyethylene) ndizosankha zodziwika bwino chifukwa cha kulimba kwake, kusinthasintha, komanso kutsika mtengo. Mu bukhuli, tiwona ubwino wogwiritsa ntchito ma liner a HDPE, kulingalira mtengo, ...
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