| 摘要 |
The device (1) comprises a stator (2) and a mobile rotor (3) which rotates slowly about an axis (4) in relation to the stator (2). A motor (31) drives the rotor (3) by means of a reduction system (36). The control systems (61) of the motor (31) are programmed so that rotation of the rotor with respect to the stator taxes place at the rate of one quarter of a turn per 24 hours. To be used to expose potted plants to light.
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