| 摘要 |
An inflatable sport ball (10), such as a basketball, a football, a soccer ball, a volleyball or a playground ball, is provided with a self-contained inflation mechanism, or multiple self- contained inflation mechanisms, for inflating or more likely adding pressure to the ball (10). The mechanism is a pump (11) which is inside of the ball (10) and which is operable from outside of the ball (10) to pump (11) ambient air into the ball (10). The pump (11) contains an integral pressure-indicating device to readily determine the relative pressure of the ball (10).
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