ITEM NAME:Hydraulic Excavator DIY Student Technology Small Production Science and Edu D4R4 Hydraulic Excavator DIY Student Technology Small Production Science and Edu D4R4 Product Name :Hydraulic Excavator Preparation tools: no need to bring your own tools Age-appropriate stage: greater than 8 years old Power demand: manual operation Product use: Exercise the child's manual brain, understand the mechanical structure, learn the hydraulic transmission Principle: Hydraulic transmission is a transmission method that uses pressurized liquid in a closed system to transmit motion and power. It first converts mechanical energy into pressure energy of the liquid, and then The energy of the water passing through the piston and the pressure of the water can be converted into mechanical energy by the pressure energy of the liquid between the subtotals colour:Wood color Material:wood size:50*12*30cm Package Contents: 1* Hydraulic excavator.Colour:Wood color.
