1. The machine adds a pressure reducing valve device, which makes it easier to start when the machine starts. (Gasoline) No pressure reducing valve, hard to start machine. 2. Boom can be deflected by 60 degrees turning left and right, making the job more flexible. Other factories can only design fix boom or just turn by 30 degrees. 3. Crawler can be stretched from a minimum 32.68 to a maximum 39.37 in which and can pass through more narrow places. Other factories' wheelbases can be only designed to fix at 35.83 in.