Lost spacecraft: SpaceX said Thursday that its Starship spacecraft — which was meant to lap Earth and splash down in the Indian Ocean — exploded not long after its 7th test flight took off ...

血管造影X射线机（DSA）通常由X射线发生装置、数字化影像接收装置、图像信息分析、显示系统和导管床组成，主要用于观察血管病变和血管狭窄的 ...