| 摘要 |
The invention relates to thrusters with straight and toric pistons, with masses which use centrifugal force and to a machine which allows machining of the toric pistons. The thruster represented is a two-stroke engine with free pistons which give forces for, propulsive actions, the blast which is to stop the pistons and throw them backwards, this engine propels in a vacuum and uses 1,000 times less fuel and oxidant than a rocket. <IMAGE>
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