Abstract: A water pipe cleaning system using high-pressure nitrogen and a water pipe cleaning method using the same are provided. The water pipe cleaning system using high-pressure nitrogen includes: nitrogen pressure vessels containing high-pressure nitrogen therein; a main control unit gathering the high-pressure nitrogen from the nitrogen pressure vessels and controlling pressure of the high-pressure nitrogen; a feed piping device connected to an outlet of the main control unit and connected to an inlet of a pipe to be washed; and a discharge piping device connected to an outlet of the pipe and connected to a nitrogen discharging portion to discharge nitrogen discharged from the pipe to the outside. The main control unit is configured such that control modules are stacked on one another. Each of the control modules is configured such that the nitrogen pressure vessels are connected together in parallel, and has an individual outlet.

Abstract: A water pipe cleaning system using high-pressure nitrogen and a water pipe cleaning method using the same are provided. The water pipe cleaning system using high-pressure nitrogen includes: nitrogen pressure vessels containing high-pressure nitrogen therein; a main control unit gathering the high-pressure nitrogen from the nitrogen pressure vessels and controlling pressure of the high-pressure nitrogen; a feed piping device connected to an outlet of the main control unit and connected to an inlet of a pipe to be washed; and a discharge piping device connected to an outlet of the pipe and connected to a nitrogen discharging portion to discharge nitrogen discharged from the pipe to the outside. The main control unit is configured such that control modules are stacked on one another. Each of the control modules is configured such that the nitrogen pressure vessels are connected together in parallel, and has an individual outlet.

Abstract: Disclosed is a prefabricated type flowerpot block. It can be assembled in a simple manner, it can perform root-balling for a predetermined period and it can allow a plant to be transplanted to thus be conveniently moved. Accordingly, it eliminates the trouble of planting a plant to be transplanted in the ground during a transplanting process, and thus it prevents the roots of a plant to be transplanted from being damaged while the plant is moved to a transplanting place. The prefabricated type flowerpot block can also function as a flowerpot to plant therein any size of plant.

Abstract: Disclosed is a prefabricated type flowerpot block. It can be assembled in a simple manner, it can perform root-balling for a predetermined period and it can allow a plant to be transplanted to thus be conveniently moved. Accordingly, it eliminates the trouble of planting a plant to be transplanted in the ground during a transplanting process, and thus it prevents the roots of a plant to be transplanted from being damaged while the plant is moved to a transplanting place. The prefabricated type flowerpot block can also function as a flowerpot to plant therein any size of plant.