A welding method in which a hole forms in the surface immediately ahead of the puddle in the direction of welding. The hole is filled as the weld progresses.
The free-throw lane together with the circle surrounding the free-throw line; key.
To strike a target after wobbling in flight so that the long axis of the bullet does not follow the line of flight; typically due to insufficient spin resulting from the rifling in the barrel.
Origin
From key + hole.
Modern English dictionary
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