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Verb1.counter-drill - drill in an opposite direction
drill, bore - make a hole, especially with a pointed power or hand tool; "don't drill here, there's a gas pipe"; "drill a hole into the wall"; "drill for oil"; "carpenter bees are boring holes into the wall"
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
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For test, the bottom probe tip is preloaded when the socket is mounted to the PWB, because the angular ring is pushed against the top counter-drill. The upper tip is engaged when the DUT is inserted for test.
When incorporated into a socket design, the pins of the four-piece are pressed into a receptacle or captured between two counter-drills, to a given height.
In the meantime, Turkey is said to be angered by the exercise and plans to carry out counter-drills in the area of Cyprus.

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