Cov hlau hnyav hnyav yog cov khoom tsim los ntawm kev sib xyaw ntawm cov hlau hnyav, feem ntau suav nrog cov khoom xws li hlau, npib tsib xee, tooj liab thiab titanium. Cov alloys paub txog lawv qhov siab ceev, lub zog thiab corrosion kuj, ua rau lawv muaj txiaj ntsig zoo hauv ntau hom kev lag luam. Qee cov ...
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