Xaiv cov kav dej siab -density polyethylene (HDPE) raws li koj lub nroog txoj kab hauv av! Lawv yog cov corrosion-resistant thiab sediment resistant, thiab lawv cov pob qij txha molten tiv thaiv cov xau. Tsim tau sai thiab zoo ib puag ncig, lawv muab ntev - tiv thaiv kev ruaj ntseg ntawm cov dej nag, dej phwj tuaj, thiab cov kav dej.
