Wrong strike with a heavy hammer can cause serious injury to the hand holding the chisel. Yes, and a hell of a kick in the arm unpleasant. This work will facilitate and protect a simple removable handle (see Fig.), bent from steel strip and fixed at the top of the tool with the bolt-ladder. It will not only take your arm back to the safe zone, but will act as a spring, absorbing impact from bumps.
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Primitive "control print" — electroputere with two wires and the lamp — not the best device for "continuity" of electric circuits. Commercially available testers and isometry is also...
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If your intention is to re-bind the dilapidated books of your library, it makes sense to produce here is a simple device used as a press for trimming the worn out edges of the pages....
