A wire electric discharge machining apparatus having a structure for supplying power to a wire electrode which prolongs the life of a power supply element and reduces manufacturing and running costs. Search terms are received from the user via a web portal. In a high-pressure fuel accumulator the pressure chamber can be implemented as a blind bore, wherein the blind bore being securely sealed with a tie rod. The preferred products of the invention may be applied foliarly, to seeds, to fertilizer, or to the earth adjacent growing plants in order to enhance nutrient uptake by the plants. The main shaft gears are held axially by two washer discs which is designed to be a pressing device on the main shaft for at least one of the main shaft gears against the washer disc holding the main shaft gear axially.