| 摘要 |
The pneumatic toy gun has a nozzle through which a soft ball travels. At one end of the nozzle there is an outlet from which the ball is expelled and at the other end there is an inlet for receipt of a stream of gas under pressure. Four or more fins are mounted within the tube and function to inhibit the use of the gun to fire balls having a diameter smaller than that of balls which are intended to be shot from the gun.
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