Tiag tiag silicone yog elastic thaum ncab thiab tsis yooj yim tig dawb, thaum fake silicone muaj tsis zoo elasticity thiab nws yooj yim tig dawb.
High-cov khoom ua si silicone zoo yuav tsum tsis muaj npuas thiab tsis muaj cua npuas.
Tshawb xyuas cov khoom kuaj daim ntawv tshaj tawm thiab cov ntaub ntawv tsim khoom kom paub meej tias nws muaj kev nyab xeeb thiab ua raws.
