| 摘要 |
This device comprises an additional circuit 7 branch-connected between the trigger 6 and the relays of the welding circuit 1, 2, 3, this circuit controlling the pivoting of the protective transparent shield 8 in front of the face when the trigger 6 is pressed before the start of the welding procedure and controlling the raising of the transparent shield 8 when the trigger 6 is released, this happening after the end of the welding procedure. <IMAGE>
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