Use a white cotton glove tray. White cotton glove disc has high sweat absorption, low dust emission, good dustproof performance, good elasticity, comfortable wearing and flexible operation, and single-sided cotton material. The paddler Vautherot Lun invented the first water-resistant rowing machine from 1988. After more than 30 years of development, he drew inspiration from dumbbells and kettle bells and invented a hand-made swinging bell made of solid wood and cowhide.