| 摘要 |
A device for detecting leakage of a tube section communicating with atmosphere at a first end comprises gas filling and flow measuring apparatus for filling the tube section from a second end with a known gas. Pump apparatus is arranged for conveying the resulting gas contents between the ends back towards and through the second end. Gas concentration measuring and recording apparatus is located at the second end for recording the concentration of the known gas in the gas contents with respect to time. |
