传统工艺只能生产最小直径为Φ10 mm铸件。介绍了一种解决小孔径铸钢件内腔成形的熔模铸造工艺方法。通过优化铸件内腔结构和采用8......

传统干涉仪测向其误差是随天线阵孔径的增大而降低,而增大天线阵孔径又会出现相位模糊。奥米亚棕蝇听觉系统通过特殊的耦合机制对......

Repeating airgun sources are eco-friendly sources for monitoring the changes in the physical properties of subsurface me......