| 摘要 |
A spraying device for applying, through an injection opening, a coating material such as anticorrosion oil onto the inner walls of a hollow body, comprising a spray gun provided with an atomizing nozzle and an interchangeable front piece connected down stream thereof. The front piece comprises an ejector barrel for introduction through said injection opening and a positioning collar rigidly attached thereto, the positioning collar. The latter being adapted to define the position of the ejector barrel during spraying. A control unit connected to the spray gun comprises means for determining the duration of each spray operation from the very moment the trigger of the spray gun is pulled.
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