| 摘要 |
A method for detecting the location of a gas leak (22) in buried utility gas pipes (12) by measuring the presence of a gas (18) below or above the ground surface (14) above the pipe (12) is improved by injecting a tracer gas (18) which is lighter than air into the utility gas (26) within the pipe (12) and by using a gas detector (28) having a higher sensitivity to the tracer gas (18) than to the utility gas (26) for pin-pointing the leak position (22). |
