| 摘要 |
Minute hand (2) turns and interrupts the light of a laser (2), while behind the hand (2), there is a light receiver.A set of solar cells (3), whereto fixed is a semicircular wheel (6), drives an engine (7), over the worm wheels (8). The semicircular contacts (6), lean against the semicircular wheel (6), and belong to the signal with microcontact (5). The whole complex of solar cells (3) is on the bearings (4) that turn in the direction of east-west.
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