Unique design of spray gun device easy to operate, fast and accurate perfusion;And to ensure the maximum amount of residual fluid dripping after perfusion.During operation, the operator simply points the barrel mouth directly below the nozzle of the spray gun, presses the "start" button on the handle, the spray gun will be automatically inserted back into the barrel, and the empty barrel will be automatically peeled.Then open the filling valve and fill accurately at two speeds.At the end of filling, the spray gun is automatically lifted to the outside of the barrel, the drip plate is automatically connected to the bottom of the spray gun, and the barrel is manually pushed to the back end of the conveyor to complete.Widely used in food processing, pharmaceutical industry workshop and warehouse management;Process control of paint and fine chemical raw materials in chemical industry and measurement of finished and semi-finished products;Measurement of materials in military manufacturing.