Pickling Foods, Salting Foods: Is One Allowed to Put Back a Pickle into Its Jar Which Was Taken Out?;
Is One Allowed to Press the Button on a Fan to Control the Oscillating (Turning Back and Forth) Cycle on Shabbos? Using Water Vaporizers...
opening Up a Loose Leaf, "My Key Is Bent, Could I Bend It Back in Shape?", and Fixing a Safety Pin;