1)circumferential notch,园形缺口2)Notch geometry,缺口形状3)notch appceranec,缺口形貌4)a breach in mountain shape,山形缺口5)breach outline,缺口廓形6)V-notch,V形缺口
用法例句
The frac'ture mechanics analysis testing data show that the method of measureing frac'ture toughness of cemented carbide with three-point bend specimen with a breach in mountain shape is reliable.