华中科技大学：pzt-jh20/3型真空，空气高温压电测试装置投入使用!
huazhong university of science and technology: pzt-jh20/3 vacuum, air high temperature piezoelectric test device put into use!
huazhong university of science and technology: pzt-jh20/3 vacuum, air high temperature piezoelectric test device put into use!