| 摘要 |
Two electrodes 4, 9 are housed in an insulating body 1 closed by a cover 5 capable of being lifted off for evacuation of the arc extinguishing gases, in opposition to the spring 7. Between the electrodes and the body 1 is interposed an insulating screen 12 able to gather the vaporised metal depositions from the electrode 9 of the arc extinguishing type. <IMAGE>
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