| 摘要 |
The float has a fixed frame and peripheral accessories (3-8) allowing terrestrial or marine use. The float can have rollers for positioning it in the water, extending in arcs of a circle in perpendicular planes. The float can have four rollers in an arc of a circle assembled in crescent pairs , the crescents themselves being in perpendicular planes. The float can have four lines of the rollers in arcs of a circle con4ncedt in crescent pairs.
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