| 摘要 |
<p>The gate system comprises gate elements (5) which allow or block passage of a bullet (6) through a pipe (7). The gate elements (5) are spring loaded (4) into the closed position and openableby pistons (3, 10). Passage of the bullet (6) through said pipe (7) in a first direction is always possible, passage in the reverse direction is only possible when the gate elements (5) are in the open position.</p> |
