Kev xa khoom EPS thoob ntiaj teb tau ua tiav tiav, suav nrog EPS cov kab ntau lawm xa mus rauCanadathiab30 teeb ntawm EPS pwmxa mus rauRussia.
Tag nrho cov khoom siv thiab pwm tau ua tib zoo npaj thiab tshuaj xyuas ua ntej xa khoom kom ntseeg tau tias kev thauj mus los nyab xeeb thiab ua tau raws li qhov yuav tsum tau ua. Qhov kev xa khoom no txhawb nqa EPS kev tsim khoom hauv kev lag luam txawv teb chaws.
