| 摘要 |
The indicating strip 9 is held in an eclipsed position against the base 5 of the lightning arrester by a lock mechanism 12-13 provided on either side of the opening 8 for the escape of the gases produced by the short-circuiting, so that the envisaged end of the said strip is freed under the pressure of the gases and unfurls laterally in a conspicuous manner. <IMAGE>
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