Xov Xwm Tuam Txhab
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Dab tsi yog cov khoom siv raw ntawm daim ntawv
Cov khoom siv raw siv los ua cov ntaub so ntswg yog cov hauv qab no, thiab cov ntaub ntawv raw ntawm cov ntaub so ntswg sib txawv tau muab cim rau ntawm lub logo ntim. Cov khoom siv dav dav tuaj yeem muab faib ua pawg hauv qab no: ...Nyeem ntxiv -
Yuav ua li cas yog kraft ntawv
Kraft daim ntawv yog tsim los ntawm cov txheej txheem vulcanization, uas ua kom cov ntawv kraft zoo kawg nkaus rau nws txoj kev siv. Vim tias cov qauv nce ntxiv rau kev rhuav tshem, rhuav, thiab lub zog tensile, nrog rau kev xav tau ...Nyeem ntxiv