| 摘要 |
<p>The present invention relates to a method for using a sensor for saving toilet paper. To prevent a user from thoughtlessly using toilet paper, a sensor is attached to a roller of the toilet paper and in the case of the roller turning greater than a certain number of times, a speaker sounds an alarm, which alerts the user to a saving of the toilet paper. To this end, the present invention includes the sensor and the speaker.</p> |
