A.割口連續(xù)屈撓4萬次 B.割口連續(xù)屈撓3萬次 C.不割口連續(xù)屈撓4萬次 D.不割口連續(xù)屈撓3萬次
A.10mm B.15mm C.20mm D.25mm
A.15N/cm B.20N/cm C.25N/cm D.30N/cm