| 摘要 |
The invention is a welding torch with a control means on the torch itself for adjusting welding current. This control means has a thumb button which can be actuated by the welder to turn the torch on or off and to adjust the current to an appropriate value for the weld being made. A latch means at one extreme of its travel is provided to hold the thumb button in the off position. This prevents the torch from being accidentally actuated by inadvertently moving the button.
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