摘要:
Process for controlling the development of parasites in an animal environment equipped with an air introduction device, according to which a parasiticidal powder composition is introduced into the air introduction device, preferably according to which the air introduction device comprises one or more point(s) of introduction of air into the animal environment located close to the animal droppings. The invention also relates to the use of the process, to the use of a parasiticidal composition in an air introduction device for controlling the development of parasites in an animal environment, to a device for controlling the development of parasites in the animal environment, and to a livestock building equipped with such a device.
摘要:
The invention relates to a method for the laser welding of metal parts that comprises generating a CO2 laser beam, dispensing a protection gas jet made of said gas or gas mixture in the direction of the junction plane between the parts, melting and evaporating the metal of the metal parts with the laser beam in order to generate a metal vapor capillary with the simultaneous generation of a metal plasma that propagates outside the metal vapor capillary and thus forms a metal plasma plume above said junction plane. The protection gas jet is further directed towards the metal plasma plume forming above the junction plane. The gas jet is preferably directed so that the latter comes flush with the top of the metal plasma plume and impinges on the part(s) at a location where the metal of said parts has not been molten by the beam.
摘要:
A method and system for handling media at a communication entity, wherein the media is associated with a communication session that is capable of entering an active state and an inactive state. The method comprises determining when the communication session is in an inactive state, causing the media associated with the communication session to be stored when the communication session has entered an inactive state, and causing the stored media to be conveyed to a user of the communication entity upon determination that the communication session has re-entered an active state.
摘要:
A method and an apparatus for welding with a laser beam. A shielding gas mixture of nitrogen and helium is used and the proportions of the component gases are modified depending on the laser beam's power or power density. Plasma formation in the shield gas is minimized by increasing the proportion of helium as the laser beam's power or power density increases.
摘要:
A method for welding metal work pieces with a CO2 type laser. A first shielding gas is used on the topside of the work piece, a second shielding gas is used on the backside of the work piece. The first and the second shielding gases have different compositions. A full penetration weld joint is produced by at least a laser beam which is delivered from the topside of the work piece. A plasma, which contributes to the production of the welded joint, is created in the second plasma gas.
摘要:
A method for the hybrid laser-arc welding of several metal workpieces. The welding process uses at least one laser beam and at least one electric arc. The metal workpieces are stacked in a multiple-thickness configuration and the laser beam and the electric arc are used to weld the edges of the multiple-thickness configuration.