Coaxial control dual nozzle

A coaxial control dual nozzle, comprising:

• an inner nozzle body having an injection port through which a first fluid is injected;
• an inner needle connected to the inner nozzle body and having a hollow tube needle configured to provide a discharge port for the first fluid;
• an outer nozzle body assembled with one end of the inner nozzle body and having an injection port through which a second fluid is injected;
• an outer needle connected to the outer nozzle body and disposed to surround the hollow tube needle provided to the inner needle, the outer needle having a hollow tube needle configured to provide a discharge port for the second fluid;
• an inner needle positioning unit configured to control a location of a central axis of the hollow tube needle provided to the inner needle;
• an outer needle positioning unit configured to control a location of a central axis of the hollow tube needle provided to the outer needle;
• a pneumatic controller body assembled with the other end of the inner nozzle body and having an injection port through which air is injected;
• and
• a needle shaft installed inside the pneumatic controller body and operated by the air to control or block the flow of a solution transported to the inner needle.