Characteristics of protective cover: steady and durable, smooth operation, low noise, beautiful appearance. Platinum protectilem pelliculae optimum est ad altum velocitatem instrumentum adferentem ferrum, quod est et gladus et liber vibration is sonitus. Instrumentum protectilem pelliculae non solum vitam servitutis pelliculae protegit, sed magis importantem, densitatem instrumenti machinae determinat. At the same time, the protective cover can resist hammers, stones, or certain impacts without being pierced or cracked, effectively protecting construction safety