57% 2700MPaAy
43% 21200MPa (A)
● 8 txheej Multilayer xim
● Los ntawm 43% mus rau 57% gradient rau pob tshab
● Lub zog qhia gradient ntawm 700MPa rau 1200MPa
● Tsim nyog foranterior, yas thiab 14unit txuas hniav