The pendulum model is a classic model in physics and has important theoretical and practical significance. In the actual application process of engineering. the characteristic that the simple pendulum has a tendency to always be stable towards the low side of the gravitational potential energy is often used to design the corresponding deformation mechanism as a sensing or control comp... https://www.bekindtopets.com/super-value-Keychron-M4-Wireless-4K-Mouse-flash-choice/