| 摘要 |
An igniter for an electric primer, applicable notably to the firing of mines, comprising a two-wire flexible trapping line disposed across the trapping area and short-circuited at one end, and a controlled semi-conductor element or "thyristor" connected in series with said electric primer and a source of electric current, said two-wire trapping line being connected to said controlled semi-conductor element so as to cause same to become conductive and thus fire the primer when the two-wire line is broken.
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