- notch coefficient
- notch number
- 缺口: breach; gap; loophole
- 系数: coefficient; ratio; modulus; ...
- 疲劳切口系数 疲劳缺口因子: fatiguenotchfactor
- 孔口系数: coefficient for orifice; coefficient of orifice; orifice coefficient
- 扩口系数: flaring coefficient
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