GEabbr.美国通用电气公司（=General Electric Coabbr.地面设备（=ground equipment）abbr.锗（=germanium）Geheen.吉

1. Because the stator consists of elastomer and piezoelectric ceramic, degree of freedom and physical field coupling problem need to be solved.
   定子由弹性体和压电陶瓷两种材料组成，不仅存在自由度耦合问题，而且还存在不同物理场的耦合问题。