With two patents of snow blade
Patents : one of the triangle of spring wall system. Case of pavement obstructions such as extrude covers or bridge expansion joint part when turning shovel and spade plates have no overall beating. And shovel Board form a 75 ° angle with the ground, snow can eradicate relative compacted snow.
Technology patents II : vertical shaft - damping dynamic balance system. When the primary when the car balance, the system allows large shovel and ground balance forever and shock - absorbing protection. It is more advanced than the plate balance, noise, and not easily damaged.
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