Qhov tseeb, kev siv xyoob ua cov khoom siv hauv pem teb tsis muaj dab tsi tshiab.Nws yog to taub hais tias xyoob flooring tau tshwm sim nyob rau hauv lub xyoo 1980s, thiab ntau lawm technology twb matured, thiab ib tug loj tus naj npawb ntawm lawv tau raug xa mus rau txawv teb chaws.Txawm li cas los xij, hauv kev lag luam hauv tsev, tib neeg tau lees paub ...
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