1. Ringent chestnut is a very popular chestnut product, processed byadoptingchesnuts with shells, carved and roasted, packed with aluminum bags, sterilized.

2. The inspiration originated from the structure of "Proa", with ringent trailing wheels to maintain vehicle body's stability.

3. The formulas of internal force, displacement stress was deduced according to the general mechanics theory of the ringent cylindrical shell.

4. ETM data reveal that the Yuanmou fault is mainly characterized by horizontal left-lateral and shear strike-slip, including ringent shear and pressed shear in part.

5. The article bases on the result of elastic-optic experiment and uses the energy method, roll theory and thick tube theory to calculate the contact pressure in ringent and close section.