Fuse metal together by directing huge amounts of energy into small areas.
Fills storage battery cells with sulfuric acid solutions of specified concentration preparatory to forming and charging: Arranges batteries in groups on tables or trucks according to specified acid concentration. Holds spouts of hoses on gravity flow or siphon-type fillers over battery vents. Adjusts valves manually or pushes pedal to control flow of acid to cells. Fits rubber gaskets on multiple filler head of vacuum filling machine to set level of fill. Positions filler head on battery vents and adjusts controls to start vacuum action and fill cells. May mix acid and water and adjust solution to prescribed specific gravity. May bring acid in insufficiently filled batteries to specified level and be designated Acid Leveler.