2) old vaginal laceration
陈旧性阴道裂伤
3) old laceration of cervix
陈旧性子宫颈裂伤
6) old crack
陈旧性裂纹
1.
By means of chemical analysis,mechanical Property test,macroscopic examination,microstructure examination and fracture morphology observing,this paper established that the old cracks had existed before installation and these cracks will expand by sudden overload during operating and therefore failure will occur.
通过化学分析、机械性能测定,低倍检验、金相组织检验、断口形貌观察,确定曲轴在安装使用前有陈旧性裂纹。
补充资料：陈旧
1.旧的﹔过时的。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条