Part change and structure change were two factors causing PFA evolution.Part change leading to PFA evolution was discussed in particular. 產(chǎn)品族結構進(jìn)化的因素包括零件變化和結構變化，重點(diǎn)研究了由于零件的變化而引起的產(chǎn)品族結構進(jìn)化問(wèn)題。
Strictly speaking, the classical definition of thixotropy pertains only to those fluids that exhibit reversible structural changes. 嚴格說(shuō)來(lái)，對觸變性所下定義只限于那些表現可逆性結構變化的流體。
The microstructures change of super-high strength of austenite stainless still silk in multi-ply drawing were analysed. 分析了超高強度奧氏體不銹鋼絲在多道次拉拔過(guò)程中的組織變化。
