crater crack

基本解釋

The main defects of laser spot welding of aluminum are crater, hot crack and porosity which created by oxide film and keyhole instability, .
焊點(diǎn)中存在的主要缺陷是氣孔，表面下塌，熱裂紋，其中氣孔主要為氧化膜氣孔和匙孔不穩(wěn)定形成的氣孔。
Due to the rebar reinforcing and crack restraining effects, the blasting crater in reinforced concrete is of a ladder model and its size is much smaller than that in the concrete medium.
同時(shí)，由于鋼筋的增強(qiáng)和止裂作用，鋼筋混凝土中爆炸漏斗坑成階梯型，且其破壞范圍遠(yuǎn)小于混凝土介質(zhì)。