Aiming at the vibrations of the multistage gear transmission system aroused by the gear meshing excitation. a novel active vibration control structure with built-in piezoelectric actuators (PZT) was established. The active control forces generated by the PZT were transmitted to the shafts through the additional supporting bearings. In addition. https://macorners.shop/product-category/canvas-beach-bag-with-rope-handle/