A via structure having improved reliability and performance and methods of forming the same are provided. Accordingly, when a new node intends to join the network, the existing nodes forming the network can allocate a node key to the new node by themselves. Each of the at least two adjustable speed drive is connected, on a direct current side, to the direct current bus. There is a head difference between the tip of the spray nozzle and the liquid level in the solution tank, which head difference causes water solution in the solution tank to be supplied into the spray nozzle. Upon receiving a query request, a slate of advertisements for the time period may be output for sending to a web browser for display. The guiding element and the guiding receptacle extend perpendicularly to the center axis of the main body of the tool.