Mental wear and tear refers to the depreciation of fixed assets such as machinery and equipment due to advances in science and technology.
Which of the following belong to mental wear and tear?
Lao Cai is a well-known carpenter from far and near. He feels that he is not accustomed to using electric planers and electric saws. Therefore, the planers, saws and other woodworking tools he uses when helping others to make furniture are still traditional