What are secondary waves

Secondary waves are a type of elastic wave, they move through the body of an object, unlike surface waves. (assuming your talking about earthquakes)

Explanation:

chinese civil war took place over a long period of time between 1927 and 1950. the war was interrupted when japan invaded china in 1936 and by world war ii. the war was fought between the nationalist government of china, also called the kuomintang (kmt), and the communist party of china (cpc).