Cov khoom siv ntawm tes twg yog qhov zoo tshaj rau kuv daim ntawv thov: alloy steel, aluminium, stainless hlau, lossis hlau alloy? Ntau yam tuaj yeem cuam tshuam qhov kev txiav txim siab los yuav ib lub xov tooj ntawm tes, xws li tus nqi, qhov hnyav ntawm daim ntawv thov (xws li, qhov loj me, qhov hnyav, qhov khoom tso), durability, ib puag ncig, thiab lwm yam. Txhua tus khub ...
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