Details of excavators construction cases are one of the Lianyungang Municipal Party Committee, which is one of the lithotripsy field developed by the Municipal Government. The annual output is 2.4 million tons. Due to the good stone quality, the main supply of railways, highways, and Lianyungang Tianwan nuclear power plant will be supplied. Use, the quarry of Lianyungang City*. The customer said that since the use of the SY420 excavator, it has greatly improved the work efficiency. On average, one car is installed every 5 minutes, the efficiency is high, the time is less, the money is made more. Essence