Casting defects, especially porosity, will reduce fatigue strength of the crank-shaft.
铸造缺陷，尤其是铸造缩松，降低了曲轴的疲劳强度。
2
To refit a crank-shaft press into P/M automatic press is a common way for some small-scale factories.
利用曲轴冲床改装为粉末冶金自动压机，是一些小型企业常用的方法。
3
Finding involved inadequate corrective actions to prevent repeat failure of the number nine main crankshaft bearing on emergency diesel generator number one.