Based on characteristics and trap types of gas reservoirs in large and medium gas fields in China, 4 gas reservoir model......

A dry-gas seal system is a non-contact seal technology that is widely used in different industrial applications.Spiral-g......

The pulsed working characteristics of the neutron tube ion source were studied experimentally. The principle and method ......

针对光栅尺具有断电位置复位、无累计误差、高精度优点，在光学隔振平台上分别建立开放式和封闭式绝对光栅尺实验系统，绝对光栅尺采用......