• 2022-05-26
    圆形截面拉伸试件,长试件的标距()
    A: [img=103x37]18038d70f74e2ec.jpg[/img]
    B: [img=101x35]18038d70ff68791.jpg[/img]
    C: [img=144x46]18038d7109dfec7.jpg[/img]
    D: [img=130x37]18038d711411dcf.jpg[/img]
  • 举一反三