What is the main function of aluminum alloy plate in Helen's patented piano technology?

The main purpose of Helen's aluminum alloy piano middle plate design is to prevent the piano middle plate from deforming and sinking, because all upright pianos are almost wooden middle plate structures at present, and the wood is easily deformed due to the differences in humidity, temperature and regional climate. After deformation, the keys will sink, which will affect the use of the player. It is the first time for Helen piano to use aluminum alloy middle plate in China, which fundamentally changes the problem that the wooden middle plate is easy to deform, completely solves the problem that the keyboard changes when playing the piano, and is beneficial to the stability of the piano middle plate.