laval density

• 拉瓦尔密度

laval density的用法和样例：

例句

1. Two types of solid micro-thruster structure won designed based on MEMS technique, one of which with discrete and abnormal laval nozzle.
   摘要设计了两种基于微光机电技术的固体微推力器结构，其中一种结构具有不连续的非正常拉瓦尔喷管。