| 摘要 |
PURPOSE: A small door cleaning device and a retainer cleaning method using the same are provided to prevent damage to a small door due to foreign materials by cleaning the inside of the small door and a retainer. CONSTITUTION: A small door cleaning device(100) comprises a main body(20), a hose, a vertical hydraulic cylinder(40), and a longitudinal hydraulic cylinder(50). The main body comprises a hollow hole and pipes(10,12,14) having multiple through-holes by which the hollow hole is connected to the outside. The vertical hydraulic cylinder is connected to the main body to vertically move the main body. The longitudinal hydraulic cylinder is connected to the vertical hydraulic cylinder to longitudinally move the main body. |
