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Definition and UsageDefinition: The root - controlling device, also known as the root - controlling container, is a tool specifically designed for regulating the growth of seedling roots. Its main material is usually plastic. Usage: Centered around regulating root growth, it prevents root rot and the coiling of the main root, overcomes the root - entanglement defect brought by conventional container seedling raising, and is widely used in fields such as horticulture, forestry seedling raising, and urban greening. Structure and ComponentsComponents: Common root - controlling devices are generally composed of components such as fences, tree boards, screws, and chassis seats, which are convenient for assembly and use. In some cases, to save costs and facilitate assembly, the buckle rods are changed to plastic screws, and the latest stitching material uses U - shaped screws. Unique Design: There is a special film on the inner wall. The side walls of the container are alternately concave and convex, and there are air holes at the top of the external protrusions. This design is the key to achieving the functions of root - increasing and root - controlling of the root - controlling device.</