key lock theory

The study direction in the future is to establish open-celled theory for continuous extrusion in order to realize the transform of achievements in the laboratory into commercial applications as soon as possible.

综述了开孔微孔塑料的制备方法,介绍了基于间歇成型法制备开孔微孔塑料的开孔理论,分析了间歇成型法的工艺条件对开孔结构的影响。

The \'crack theory\' and \'porous theory\' are introduced and the difference in the concept between Fillunger and Terzaghi is expounded.

本文首先回顾扬压力研究发展的历史,叙述扬压力中"裂缝理论"和"孔隙理论"两个派别的基本观点,并着重陈述孔隙理论中Fillunger和Terzaghi的不同看法。