cov khoom

  • 5mm 6mm 8mm 10mm 12mm Kub Soaked iav

    5mm 6mm 8mm 10mm 12mm Kub Soaked iav

    Thaum tshav kub kub soaking yog ib qho kev puas tsuaj nyob rau hauv uas lub pane ntawm toughened iav yog raug rau kub ntawm 280 ° rau ob peb teev nyob rau hauv ib tug tshwj xeeb kub gradient, kom induce tawg.