Mental wear and tear: refers to the depreciation of machinery, equipment, and other fixed assets due to the advancement of science and technology. Which of the following are mentally worn? ['An enterprise has a high-precision grinder with a service life of 10 years, but due to high-efficiency use, only two years, some major components need to be replaced.', 'After finding a new job, Xiao Chen bought an expensive laptop computer. After only one year, the computer is as good as new, but it is not worth much money.', 'Lao Cai is a well-known rustic carpenter. For electric planers and chainsaws, he just feels uncomfortable, so the planer, saw and other woodworking tools he uses to help people with furniture are still traditional.', 'An enterprise imported a set of the most advanced smelting equipment, but the efficiency of these imported equipment was not fully exerted due to the lack of enthusiasm for technical personnel.']