E/M is an important parameter that affects the specimen quality.With increasing E/M, the density of the specimens increases firstly, and then the mach-hole appears that debases the compact quality.

• 装药比是影响压实质量的重要参数，随着装药比的增大，试件密度呈增大的趋势，但装药比过大，会在压实件中产生马赫孔，致使压实质量下降。