A welding torch comprises an electrode, means to supply weld filler material, a nozzle surrounding the electrode, means to supply inert gas to the nozzle and a shroud surrounding the nozzle. The apparatus comprises a first mounting rail, adapted for electrically coupling a power element to the output load. The apparatus further includes an update script generator for generating, if a code image running on a target node in the mesh network needs to be updated, a code update script with reference to the code images of the target node and its neighboring nodes stored in the code image DB, and performing update of the target node using the code update script. The bottle necks engage the seals which, together with the division wall, substantially seal the front chamber from the rear chamber while the spout end portion of the wine bottles is supported in the rear humidified chamber. This alleviates the burden on the external logic, which otherwise would have to control each individual switch device to accomplish the desired switching behavior of the switch assembly.