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An armor with rollers is provided that enables a user to move in all positions by rolling on a hard and smooth surface while constantly varying his bearing points on the ground.
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| Number | Title | Issue Date |
| 4990032 | Retaining wall module with asymmetrical anchor Individual precast concrete wall units for erecting a retaining wall structure each includes a face member, a support member, and an anchor member. The support member has a front portion that is connected to the face member, either at the center of the fa... | 02/05/1991 |
