短語詞組短語crack -growth trajectory 裂紋擴展軌跡Crack unsteady growth 裂紋非穩(wěn)定擴展堦段Crack stable growth stage 裂紋穩(wěn)定擴展堦段crack random growth 裂紋隨機擴展fatigue crack early growth 疲勞裂紋早期擴展slow -crack-growth 耐慢速裂紋擴展surface crack fatigue growth pattern 表麪裂紋疲勞擴展形貌 返回 crack growth