CAT (CAT) ® Mining hydraulic excavators are the most popular hydraulic shovels among the industry's counterparts. The reason is simple. It adopts German SKL Warrior bearing with long service life, low noise and low vibration, intelligent matching, high rigidity, low wear and long service life. Its improved durability and reliability provide the required robust engine and efficient hydraulic system to achieve faster operating speeds, thereby reducing cycle times.g. As a result, productivity is improved and total ownership and operating costs are reduced.