explain
Also write "Wo Wo". Chen, an ancient rice ramming instrument made of wood and stone. People in Sichuan and surrounding areas write "Duiwo".
Sichuan and some northern areas call mortar "opposite nest" and "rolling bowl", and the pestle is called "opposite nest stick". Wood, stone and iron are used as raw materials. A long time ago, the basic tool for rice threshing was a stone-to-nest, generally 60*80CM (height * upper diameter). This ancient tool can also be seen in the countryside.
There are three kinds of nests: wood, stone and iron, ranging in size from 8 * 10 cm to 13 * 16 cm. Generally used to pound herbs, nuts, etc. Mash all kinds of things into powder or paste or sauce.