DIY Channel Hydraulic Excavator
Material: wood Suitable
age: over 8 years old
Note:
1.Dinosaur batteries need to be purchased by yourself.
2. English instructions for hydraulic excavator
Principle:
Hydraulic transmission is a transmission mode which uses pressurized liquid in closed system to transfer motion and power. It converts the mechanical energy into the pressure energy of the liquid, and then the pressure energy of the liquid into the mechanical energy.
