| 摘要 |
The invention consists of a casing of flexible impermeable material formed by the assembly of the pieces 1, 2 and 3 closed by a valve 4, the valve permitting the introduction into the casing of liquid (for example, water) or of gas (for example, air) which will give the casing its shape (vessel) and the pressure of which, held in the casing by the stopper 4', will confer on the assembly the rigidity required for convenient gripping in the hand. <IMAGE>
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