| 摘要 |
A water tank with an illuminating device comprises a source of light and a condenser positioned outside the water tank and below the bottom thereof, a light guide made of a transparent material to guide the condensed light upwards, with the top end of the light guide positioned above the level of water filled in the water tank, and a reflecting surface to reflect the guided light toward the water tank below. The water tank is illuminated from above without locating any illuminating device atop.
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