[机] actual tensile stres strain diagram
shí jì zhāng lì yìng lì yìng biàn tú ㄕˊ ㄐㄧˋ ㄓㄤ ㄌㄧˋ ㄧㄥˋ ㄌㄧˋ ㄧㄥˋ ㄅㄧㄢˋ ㄊㄨˊ