| 摘要 |
A low-pressure testing device for an automobile tire has a base, a warning device, two parallel separated resilient tubes The base is firmly placed on the ground. The warning device is mounted on one end of the base and has a first switch, a second switch and a warning circuit. Each of the parallel separated resilient tubes has a first closed end and a second end connected to the first switch or the second switch, as appropriate. When the two tubes are pressed simultaneously, the first and second switches close the warning circuit to sound an alarm.
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