Tsev 12 Rau sab kawg 2/2

Peb nyob zoo yog ib qho ntawm cov ua polymer rau cov khoom lag luam tshwj xeeb thiab cov muag khoom hauv Suav teb. Thov so assured mus yuav zoo polymer rau cov nplaum tshwj xeeb ntawm cov nqi sib tw los ntawm peb lub hoobkas. Yog xav paub ntxiv, tiv tauj peb tam sim no.

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