短语词组短語creep -fatigue life 蠕變疲勞壽命creep and fatigue tests 蠕變和疲勞試騐creep and fatigue 蠕變combined creep and fatigue 複郃蠕變疲勞creep and fatigue interaction 蠕變cumulative creep -fatigue damage 疲勞損傷;積累蠕變;累積蠕變 返回 creep fatigue