单词	bed collapse
释义	bed collapse 床层塌落
随便看	existing questions existing questions in existence existing railroad existing railway existing-railway existing railway bridge existing railway concrete bridge Existing railway curve line existing railway line existing railway lines existing railways existing-railway speed-raising existing railway station existing railway steel bridges existing railway surveys existing rate existing rationality existing rc member existing rc structure existing record Existing regional frameworks existing reinforced concrete existing reinforced concrete beam existing reinforced concrete beams Existing reinforced concrete bridge