Methods and systems are described for determining a physical address for a device connected to a network via a network access point. The carrying device includes a base, a movable positioning stand, a movable position-limiting block, and a linking unit. Workpieces of a batch are loaded onto all of the treatment sites and then simultaneously and identically treated by operation of treatment stations with which the process sites are aligned. With the present method, the reactor vessel of the pressurized water reactor can be carried out in a short period of time with high efficiency.