The first is to buy a second mobile phone before setting a good price. Three large pieces of machine must not be moved and must be original, but it is not possible to think a little wrong.
Second: check the running motor. When you buy a car, take a look. The pipe is almost zero. If it is assembled, it will come out of the road.
Third: the inspection of the oil pump of the excavator mainly depends on its leakage.
Fourth: check the children's nozzle, if the traces of long term poor quality diesel oil nozzle are broken.
Fifth: how many hours do most people like to buy a second cell phone? It's sometimes useless.