Cov ntaub ntawv iav tsom iav feem ntau muaj xws li hlau, yas, cellulose acetate, cov ntaub ntawv sib xyaw, thiab lwm yam. 1. Cov khoom siv hlau hlau iav tsom iav feem ntau muaj xws li stainless hlau, titanium, aluminium-magnesium alloy, silver-magnesium alloy thiab lwm yam ntaub ntawv. Stainless hlau iav tsom iav muaj qhov zoo s ...
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