| 摘要 |
The present invention relates to the user warning device embedded in a step ladder that is suited for craftsmen or workmen or for the ladders used in homes to change a bulb or climbing in the attic and the same technology could be adopted in the extension ladders as well. However, it is not about how safe the ladder is, but it is about embedded "Safety Feature" within the "Safety Ladder" and how it warns the user and prevents the accidents that occur, due to human factor in using these "So Called Safety Ladders". The warnings are both audio and visual.
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