This paper mainly deals with the characteristics of the thrust na ppe and sliding nappe structures with detailed field first-hand data and prelim inarily analyzes their genetic mechanism.
本文以详实的野外第一性资料，着重阐述了其推、滑覆构造特征，并分析了成因机制。
2
With a view to preventing flour dust from explosion in feed mills, the author has determined and made a prelim nary study of its basic characteristics.
从粉尘防爆的观点出发，对饲料粉尘的基本特性进行了测定和初步的研究。
3
This paper not only describes the principle of the method, but also introduces the steps in detail, and demonstrates the prelim…