| 摘要 |
The operating element has a scale (3), marked with symbols for different positions of a rotary knob, provided as part of cover (10) constructively combined with the operating element, a light conductor (6) split into 2 parts (6.1,6.2) for scale and corona illumination, which are separated by a peripheral slot (8) into which part of the cover depends and illuminated by a light source (9) positioned at the rear of a light rotor (7).
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