Raws li ib qho ntawm cov kws tshaj lij biaxially- taw qhia polyethylene terephthalate lwm tus neeg nyob hauv Suav teb txij li xyoo 1997, peb tau tshwj xeeb los ntawm cov khoom zoo thiab cov kev pabcuam zoo. Thov koj xav tias dawb mus yuav pheej yig biaxially - taw qhia polyethylene terephthalate ua nyob rau hauv Suav teb nov los ntawm peb lub hoobkas. Rau nqe kev sab laj, tiv tauj peb.