短語詞組短語crack dynamic propagation 裂紋動態(tài)擴展crack rapid propagation 裂紋快速擴展crack random propagation 裂紋隨機擴展crack -propagation velocity 裂紋擴展速度crack fatigue propagation rate 裂紋疲勞擴展速率;擴展速率crack propagation criterion 裂紋擴展判據dynamic crack propagation 裂紋動態(tài)傳播;動裂紋擴展;動態(tài)裂紋擴展fatigue crack propagation rate 疲勞裂紋擴展速率 返回 crack propagation