Evaluating intermediate frequency error property of wavefront of optical components with PSD collapse;
用功率谱密度坍陷评价光学元件波前中频误差特性
The Mechanism and Application of Negative Pressure EPC Mold Collapse Defect
负压消失模铸造铸型坍塌缺陷的形成机理及应用
The Mechanism of the Mold Collapse Defect for Iron Casting in Expendable Pattern Casting Process with Dry Sand and Vacuum
真空消失模铸造铸铁件铸型坍塌缺陷成因的研究
In this paper the gas gap in the expendable pattern casting process was studied and the relation between the gas gap and collapse defect is discussed.
对消失模铸造铸铁件流动前沿的气隙进行了研究 ,探讨了气隙与坍塌缺陷的相互关系。
A place where a cave-in has occurred.
坍陷处出现塌陷的地方
A collapse, as of a tunnel or structure.
坍陷坍陷，如隧道或建筑的塌陷
When did the roof cave in?
屋顶是什么时候坍塌的？
His fences were continually falling to pieces.
他的篱笆总是坍塌。
The roof of the tunnel caved in (on the workmen).
隧道顶坍塌（压住工人）.
The walls caved in during the earthquake.
墙壁在地震中坍塌了
The roof threatened to fall in.
屋顶有坍塌的危险。
The bridge caved in above the mine
那矿上面的桥梁坍塌了。
The walls blew in because of the pressure.
墙因压力而向内坍塌。
The bridge broke down in an earthquake.
桥在一次地震中坍塌了。
state of being decayed,collapsed or destroyed
破败、坍塌或毁坏的状态
The floor buckled up under the weight of too many people.
由于人太多楼板坍塌了。
the mouldering ruins of an old castle
古堡逐渐坍塌的遗迹.
The bridge broke down under the great pressure
桥在重压下坍塌了。
Study on Application of Bone Mineral Density in Prediction of Collapse of Femoral Head after Avascular Necrosis
骨密度在股骨头缺血坏死后塌陷预测中的应用