Cov ntaub ntawv raw khoom nce nce ua rau cov nqi tsim khoom nce

Tsis ntev los no, cov ntaub ntawv raw xws li txhuas, magnesium alloy, thiab yas tau nce, ua rau cov nqi tsim khoom nce. Yog li, tus nqi ntawm qee yam khoom yuav tsum tau hloov kho. Kuv vam tias koj tuaj yeem nkag siab.