| 摘要 |
A slab-shaped block ramp is fan-shaped, and includes a plane plate and a slope plate. The plane plate is provided on an entrance/exit of boundary portions, and includes a multiple rows of plane blocks. The slope plate is connected to the outer circumferential portion of the plane plate, and expands at the same angle as the inner angular portion of the plane plate. The slope plate includes a multiple rows of slab type slope plates and upholding blocks supporting, from below, the slope plates.
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