◐ Cov yam ntxwv khoom siv
1.Rubber yog extruded nrog cov txheej txheem sib kis thiab qhov kub tsawg, txhawm rau ptove plastify kev ua tau zoo.Qhov cov menyuam yog qhov dav ntawm cov duab ntev thiab nqaim, hauv oeder los txo lub zog siv.
2.Rubber yog thov tau muab faib ua ntu zus raws cov qauv ntawm lub vias. Qhov nyhav ntawm cov roj hmab thov rau txhua theem yog tswj tau kom raug, txhawm rau kom ntseeg tau tias daim ntawv thov zoo.
3.Qhov qhov hnyav ntawm thov cov roj hmab yog xam thiab tswj tau ncaj qha raws li cov ntaub ntawv ntawm cov txheej txheem. Cov txheej txheem khi los tiv thaiv ib qho cua ntawm cov roj hmab.
4.Qhov qib tsis siv neeg txheej txheem nrog ob peb lub zog ua haujlwm.Qhov khoom siv tau tuaj yeem nruab nrog tread grooving ntaus ntawv.