| 摘要 |
The device comprises a weighted piston (2) which is free inside a vertical cylinder (1) containing a liquid (5), and the base of which is connected to a turbine (14) associated with an electric generator; the outlet of the turbine being connected to the tank via a pump (16). Means (7 to 10) are provided for raising the piston back up which piston has a vertical passage (17) and means (18) for blocking this passage. <IMAGE>
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