Peb yog cov kws tshaj lij biphenyls tuam ntxhab thiab cov muag khoom hauv Suav teb, tshwj xeeb hauv kev muab cov khoom lag luam zoo. Peb sov siab txais tos koj mus yuav cov qib siab - qib biphenyls hauv Tshuag ntawm no los ntawm peb lub hoobkas. Tiv tauj peb kom paub meej ntxiv.

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